bluuebunny/crossref_metadata_2025 huggingface dataset:
Additivity Rules Using Similarity Models for Chemical Reactivity: Calculation and Interpretation of Electrofugality and Nucleofugality
Authors: Bentley T. William
Published: July 2006

A recently proposed, multi‐parameter correlation: log k (25 °C)=sf (Ef + Nf), where Ef is electrofugality and Nf is nucleofugality, for the substituent and solvent effects on the rate constants for solvolyses of benzhydryl and substituted benzhydryl substrates, is re‐evaluated. A new formula (Ef=log k RCl/EtOH/25 °C −1.87), where RCl/EtOH refers to ethanolysis of chlorides, reproduces published values of Ef satisfactorily, avoids multi‐parameter optimisations and provides additional values of Ef. From the formula for Ef, it is shown that the term (sf×Ef) is compatible with the Hammett–Brown (ρ+σ+) equation for substituent effects. However, the previously published values of Nf do not accurately account for solvent and leaving group effects (e.g. nucleofuge Cl or X), even for benzhydryl solvolyses; alternatively, if the more exact, two‐parameter term, (sf×Nf) is used, calculated effects are less accurate. A new formula (Nf=6.14 + log kBX/any solvent/25 °C), where BX refers to solvolysis of the parent benzhydryl as electrofuge, defines improved Nf values for benzhydryl substrates. The new formulae for Ef and Nf are consistent with an assumption that sf=1.00, and so improved correlations for benzhydryl substrates can be obtained from the additive formula: log kRX/any solvent/25 °C=(Ef + Nf). Possible extensions of this approach are also discussed.
Manganoan Rockbridgeite Fe4.32Mn0.62Zn0.06 (PO4)3(OH)5: Structure Analysis and 57Fe Moessbauer Spectroscopy.
Authors: Redhammer Guenther J. , Roth Georg , Tippelt Gerold , Bernroider Manfred , Lattermoser Werner , Amthauer Georg , Hochleitner Rupert
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and Crystal Structures of La3MgBi5 and LaLiBi2.
Authors: Pan Da‐Chun , Sun Zhong‐Ming , Mao Jiang‐Gao
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Insight into the Symmetry and the Structure of the Double Perovskites Ba2LnNbO6 (Ln = Lanthanides and Y).
Authors: Fu W. T. , IJdo D. J. W.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Structural and Magnetic Properties of the Kagome Antiferromagnet YbBaCo4O7.
Authors: Huq A. , Mitchell J. F. , Zheng H. , Chapon L. C. , Radaelli P. G. , Knight K. S. , Stephens P. W.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Complex Impedance and Solid‐State NMR Studies on a Novel High Proton Conductor Na‐RUB‐18.
Authors: Ishimaru Shin'ichi , Togawa Maki , Ikeda Ryuichi , Shimizu Tadashi , Shinohara Emi , Umemura Yasushi
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Contribution to the Ti—Bi Phase Diagram.
Authors: Vassilev G. P.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
[(C4H12N)2] [Zn3(HPO3)4]: An Open‐Framework Zinc Phosphite Containing Extra‐Large 24‐Ring Channels.
Authors: Liang Jing , Li Jiyang , Yu Jihong , Chen Peng , Fang Qianrong , Sun Fuxing , Xu Ruren
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chiral Phosphoramide‐Catalyzed Enantioselective Addition of Allylic Trichlorosilanes to Aldehydes. Preparative Studies with Bidentate Phosphorus‐Based Amides.
Authors: Denmark Scott E. , Fu Jiping , Lawler Michael J.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Ring Opening of Epoxides with Cyanide Catalyzed by Halohydrin Dehalogenases: A New Approach to Non‐Racemic β‐Hydroxy Nitriles.
Authors: Elenkov Maja Majeric , Hauer Bernhard , Janssen Dick B.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Specificity of the Reaction of Tetranitromethane with Alkenes in Nitromethane.
Authors: Ivanova O. A. , Averina E. B. , Budynina E. M. , Korlyukov A. A. , Antipin M. Yu. , Kuznetsova T. S. , Zefirov N. S.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Deantiaromatization as a Driving Force in an Electrocyclic Reaction.
Authors: Harmata Michael , Zheng Pinguan , Schreiner Peter R. , Navarro‐Vazquez Armando
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of New Macrocyclic Chiral Manganese(III) Schiff Bases as Catalysts for Asymmetric Epoxidation.
Authors: Martinez Alexandre , Hemmert Catherine , Loup Christophe , Barre Guillaume , Meunier Bernard
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Di‐μ‐hydroxy‐bis(N,N,N′,N′‐tetramethylenediamine)‐Copper(II) Chloride [Cu(OH)×TMEDA]2Cl2: An Efficient, Practical Catalyst for Benzylation and Allylation of Amides.
Authors: Kumaraswamy G. , Pitchaiah A. , Ramakrishna G. , Ramakrishna D. S. , Sadaiah K.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Sequential Catalysis: A Metathesis/Dihydroxylation Sequence.
Authors: Beligny Samuel , Eibauer Stefan , Maechling Simon , Blechert Siegfried
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Palladium‐Catalyzed O‐Allylation of α‐Hydroxy Carbonyl Compounds.
Authors: Schmidt Bernd , Nave Stefan
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enabling Ligand Screening for Palladium‐Catalyzed Enantioselective aza‐Michael Addition Reactions.
Authors: Phua Pim Huat , White Andrew J. P. , de Vries Johannes G. , Hii King Kuok
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Isopropyl N‐Arylmalonamates. Synthesis, Structure, Conformation and Reactions with Carbon Disulfide.
Authors: Rudorf Wolf‐Dieter , Loos Dusan , Wybraniec Joanna , Pronayova Nada , Gawinecki Ryszard , Sustekova Zora
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
β‐Cyclodextrin Promoted Aza‐Michael Addition of Amines to Conjugated Alkenes in Water.
Authors: Surendra K. , Krishnaveni N. Srilakshmi , Sridhar R. , Rao K. Rama
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Selective Catalytic Carbanionic Ethylation of Methylphenols: Influence of Catalyst and Substitution Pattern.
Authors: Steele Barry R. , Villalonga‐Barber Carolina , Micha‐Screttas Maria , Screttas Constantinos G.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Allylation of Aldehydes and Imines: Promoted by Reuseable Polymer‐Supported Sulfonamide of N‐Glycine.
Authors: Li Gui‐long , Zhao Gang
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Reagent‐Controlled Asymmetric Homologation of Boronic Esters by Enantioenriched Main‐Group Chiral Carbenoids.
Authors: Blakemore Paul R. , Marsden Stephen P. , Vater Huw D.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Direct Barbier‐Type Allylation of Aromatic Acetals and Dioxolanes in the Presence of β‐Cyclodextrin in Water.
Authors: Surendra K. , Krishnaveni N. Srilakshmi , Rao K. Rama
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Gold(I)‐Catalyzed Oxidative Cleavage of a C—C Double Bond in Water.
Authors: Xing Dong , Guan Bingtao , Cai Guixin , Fang Zhao , Yang Liping , Shi Zhangjie
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and Activity of Small Molecule GPR40 Agonists.
Authors: Garrido Dulce M. , Corbett David F. , Dwornik Kate A. , Goetz Aaron S. , Littleton Thomas R. , McKeown Steve C. , Mills Wendy Y. , Smalley Terrence L. Jr. , Briscoe Celia P. , Peat Andrew J.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Highly Diastereoselective Enolate Addition of O‐Protected α‐Hydroxyacetate to (SR)‐tert‐Butanesulfinylimines: Synthesis of Taxol Side Chain.
Authors: Wang Yin , He Qin‐Fei , Wang Hao‐Wei , Zhou Xuan , Huang Zhi‐Yan , Qin Yong
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Microwave Assisted Rapid and Efficient Synthesis of Aryl Methyl Ketones and β‐Keto Esters Using Meldrum′s Acid.
Authors: More D. H. , Mahulikar P. P.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Cyanosilylation of Ketones Catalyzed by a Nitrogen‐Containing Bifunctional Catalyst.
Authors: Xiong Yan , Huang Xiao , Gou Shaohua , Huang Jinglun , Wen Yuehong , Feng Xiaoming
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Dimethylzinc‐Mediated Alkynylation of Imines.
Authors: Zani Lorenzo , Alesi Silvia , Cozzi Pier Giorgio , Bolm Carsten
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Synthesis of 3‐(2‐Furyl)biphenyls.
Authors: Sagitullina Galina P. , Glyzdinskaya Larisa V. , Sagitullin Reva S.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Multi‐Component Reaction of Amines, Alkyl Propiolates, and Ninhydrin: An Efficient Protocol for the Synthesis of Tetrahydro‐dihydroxy‐oxoindeno[1,2‐b]pyrrole Derivatives.
Authors: Azizian Javad , Hatamjafari Farhad , Karimi Ali Reza , Shaabanzadeh Masoud
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Small Molecule Inhibitors of Plasma Kallikrein.
Authors: Young Wendy B. , Rai Roopa , Shrader William D. , Burgess‐Henry Jana , Hu Huiyong , Elrod Kyle C. , Sprengeler Paul A. , Katz Bradley A. , Sukbuntherng Juthamas , Mordenti Joyce
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Hydantoin Derivatives as Non‐peptidic Inhibitors of Ras Farnesyl Transferase.
Authors: Lee Jinho , Kim Jonghyun , Koh Jong Sung , Chung Hyun‐Ho , Kim Kyoung‐Hee
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Structural—Activity Relationship Study on C‐4 Carbon Atom of the CB1 Antagonist SR141716: Synthesis and Pharmacological Evaluation of 1,2,4‐Triazole‐3‐carboxamides.
Authors: Jagerovic Nadine , et al. et al.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Structure of the Reaction Product of Anthranilic Acid Hydrazide with Carbon Disulfide in Alkaline Medium
Authors: Britsun V. N. , Esipenko A. N. , Kudryavtsev A. A. , Lozinskii M. O.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of 2‐(1,2,3‐Thiadiazol‐5‐yl)‐1H‐benzimidazoles.
Authors: Dzvinchuk I. B.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Selective Reduction of the Endocyclic Double Bond of 3‐Substituted Coumarins by Hantzsch 1,4‐Dihydropyridine.
Authors: Liu Zhengang , Liu Qiang , Zhang Wei , Mu Ruizhu , Yang Li , Liu Zhong‐Li , Yu Wei
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Long‐Chain 3‐Acyl‐4‐hydroxycoumarins: Structure and Antibacterial Activity.
Authors: Cravotto Giancarlo , Tagliapietra Silvia , Cappello Rossella , Palmisano Giovanni , Curini Massimo , Boccalini Marco
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Domino Oxa‐Michael Addition—Aldol Reaction: Access to Variably Substituted Tetrahydroxanthenones.
Authors: Ohnemueller Ulrike K. , Nising Carl F. , Nieger Martin , Braese Stefan
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Novel Route to the Synthesis of 4‐Quinolyl Isothiocyanates.
Authors: Zhong Boyu , Al‐Awar Rima S. , Shih Chuan , Grimes John H. Jr. , Vieth Michal , Hamdouchi Chafiq
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
1‐Phenyl‐8‐azabicyclo[3.2.1]octane Ethers: A Novel Series of Neurokinin (NK1) Antagonists.
Authors: Huscroft Ian T. , Carlson Emma J. , Chicchi Gary G. , Kurtz Marc M. , London Clare , Raubo Piotr , Wheeldon Alan , Kulagowski Janusz J.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Dibenzo[b,g][1,5]diazoninedione and Isoindolo[2,1‐a]quinazoline Derivatives.
Authors: Bakavoli Mehdi , Davoodnia Abolghasem , Rahimizadeh Mohammad , Heravi Majid M.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Discovery of Novel and Selective Tertiary Alcohol Containing Inhibitors of the Norepinephrine Transporter.
Authors: Cases‐Thomas Manuel J. , et al. et al.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Syntheses of New Substituted Triazino Tetrahydroisoquinolines and β‐Carbolines as Novel Antileishmanial Agents.
Authors: Kumar Arun , Katiyar Sanjay Babu , Gupta Suman , Chauhan Prem M. S.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ytterbium‐Catalyzed Dual Intermolecular Hydrophosphination: Synthesis of Bis(phosphinyl)dienes and Bis(alkenyl)phosphine Oxides.
Authors: Komeyama Kimihiro , Kobayashi Daisuke , Yamamoto Yuta , Takehira Katsuomi , Takaki Ken
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Reactions of Allenylphosphonates with 2‐Aminoethanol and Amines.
Authors: Khusainova N. G. , Mostovaya O. A. , Berdnikov E. A. , Litvinov I. A. , Krivolapov D. B. , Cherkasov R. A.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Copper‐Promoted Carbon—Nitrogen Bond Formation with 2‐Iodo‐selenophene and Amides.
Authors: Soares do Rego Barros Olga , Nogueira Cristina W. , Stangherlin Eluza C. , Menezes Paulo Henrique , Zeni Gilson
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Domino‐Cyclization and Hydrogenation of Citronellal to Menthol over Bifunctional Ni/Zr‐β and Zr‐β/Ni‐MCM‐41 Catalysts.
Authors: Nie Yuntong , Chuah Gaik‐Khuan , Jaenicke Stephan
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Identification of a Potent and Selective Non‐Basic Cathepsin K Inhibitor.
Authors: Li Chun Sing , et al. et al.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Seragamides A—F, New Actin‐Targeting Depsipeptides from the Sponge Suberites japonicus Thiele
Authors: Tanaka Chiaki , Tanaka Junichi , Bolland Robert F. , Marriott Gerard , Higa Tatsuo
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Evolution of a Strategy for the Synthesis of Structurally Complex Batzelladine Alkaloids. Enantioselective Total Synthesis of the Proposed Structure of Batzelladine F and Structural Revision.
Authors: Cohen Frederick , Overman Larry E.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Transition Metal Complexes in Organic Synthesis. Part 77. First Enantioselective Total Synthesis of Neocarazostatin B (I), Determination of Its Absolute Configuration and Transformation into Carquinostatin A (II).
Authors: Czerwonka Regina , Reddy Kethiri R. , Baum Elke , Knoelker Hans‐Joachim
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Novel and Efficient Synthetic Path to Proaporphine Alkaloids: Total Synthesis of (.+‐.)‐Stepharine (Ia) and (.+‐.)‐Pronuciferine (Ib).
Authors: Honda Toshio , Shigehisa Hiroki
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Stereospecific Formal Total Synthesis of Ecteinascidin 743
Authors: Zheng Shengping , Chan Collin , Furuuchi Takeshi , Wright Benjamin J. D. , Zhou Bishan , Guo Jinsong , Danishefsky Samuel J.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Psoracorylifols A—E, Five Novel Compounds with Activity Against Helicobacter pylori from Seeds of Psoralea corylifolia.
Authors: Yin Sheng , Fan Cheng‐Qi , Dong Lei , Yue Jian‐Min
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
First Application of Supported Ionic Liquid Phase (SILP) Catalysis for Continuous Methanol Carbonylation.
Authors: Riisager Anders , Joergensen Betina , Wasserscheid Peter , Fehrmann Rasmus
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Nonequilibrium Phase Transitions in Model Ferromagnets: A Review
Authors: Acharyya Muktish
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Compounds and Structures in the Solid State
Authors: Hix Gary B.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Halogens and Noble Gases
Authors: Brisdon A. K.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Nitrogen, Phosphorus, Arsenic, Antimony and Bismuth
Authors: Lynam Jason M.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Carbon, Silicon, Germanium, Tin and Lead
Authors: Parr J.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Metal Complexes of π‐Conjugated Polymers and Related Polymers
Authors: Yamamoto Takakazu , Fukumoto Hiroki
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Complexes Containing Metallocenecarboxylate Ligands
Authors: Aquino Manuel A. S. , Wyman Ian W.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Do Enzymes Sleep and Work?
Authors: Engelkamp Hans , Hatzakis Nikos S. , Hofkens Johan , De Schryver Frans C. , Nolte Roeland J. M. , Rowan Alan E.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chiral Symmetry Breaking in Chiral Crystallization and Soai Autocatalytic Reaction
Authors: Gridnev Ilya D.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and Role of Glycosylthio Heterocycles in Carbohydrate Chemistry
Authors: El Ashry E. S. H. , Awad L. F. , Atta A. I.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Nitrogen‐Containing Natural Products Using Allyl Cyanate‐to‐Isocyanate Rearrangement
Authors: Ichikawa Yoshiyasu
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Organic Chemistry for Creation and Regulation of Protein Functions
Authors: Ojida Akio , Miyahara Yoshifumi , Hamachi Itaru
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Isolation, Structure, and Properties of Optically Active Chalcogenic Acids and Their Derivatives
Authors: Nakashima Yusuke , Shimizu Toshio , Kamigata Nobumasa
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Recent Progress on Switchable Rotaxanes
Authors: Tian He , Wang Qiao‐Chun
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Advances in Nitrogen Transfer Reactions Involving Aziridines
Authors: Watson Iain D. G. , Yu Lily , Yudin Andrei K.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ligand‐Modulated Palladium‐Catalyzed Aerobic Alcohol Oxidations
Authors: Sigman Matthew S. , Jensen David R.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Total Synthesis of Polyketidic Marine Natural Products: Amphidinolides. Part 1
Authors: Hiersemann Martin
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Stereoselective Synthesis of β‐Amino Acids via Radical Reactions
Authors: Naito Takeaki , Miyata Okiko
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Synthesis of Conformationally Constrained β‐Amino Acids
Authors: Ortuno Rosa M.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Current State of the Art in Cyclodextrin‐Induced Room Temperature Phosphorescence in the Presence of Oxygen
Authors: Peng Yun Lin , Wang Ying Te , Wang Yu , Jin Wei Jun
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Interplay of Indicator, Support and Analyte in Optical Sensor Layers
Authors: Orellana Guillermo , Moreno‐Bondi Maria C. , Garcia‐Fresnadillo David , Marazuela Maria D.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Application of Ionizing Radiation to Environment Protection
Authors: Chmielewski Andrzej G.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Studies on Pd/Imidazolium Salt Protocols for Aminations of Aryl Bromides and Iodides Using Lithium Hexamethyldisilazide (LHMDS).
Authors: Lerma Israel Conesa , Cawley Mark J. , Cloke F. Geoffrey N. , Arentsen Katherine , Scott James S. , Pearson Stuart E. , Hayler John , Caddick Stephen
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Mg‐Promoted Reductive Coupling of Aromatic Carbonyl Compounds with Trimethylsilyl Chloride and Bis(chlorodimethylsilyl) Compounds.
Authors: Uchida Tetsuro , Kita Yoshio , Maekawa Hirofumi , Nishiguchi Ikuzo
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Reaction Between Phosphines and Itaconic Anhydride in the Presence of Water: An Efficient One‐Pot Synthesis of 5‐Oxo‐1,2λ5‐oxaphospholanes.
Authors: Teimouri Mohammad Bagher
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Reaction Pathway of Dialkyl Phosphorochloridites with Salts of α‐Benzylideneaminocarboxylic Acids. Direct Synthesis of α‐Aminophosphonates from Isostructural α‐Benzylideneaminocarboxylic Acids.
Authors: Bayandina E. V. , Davydova E. Yu. , Abaskalova M. A. , Musin R. Z. , Al'fonsov V. A.
Published: July 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ein 8‐fach‐Parallel‐Reaktorsystem für die kombinatorische Katalyseforschung
Authors: Stoll N. , Allwardt A. , Dingerdissen U. , Thurow K.
Published: July 2006

Die fortschreitende Globalisierung der Märkte erfordert von Unternehmen, ihre Produkte mit geringerem Zeit‐ und Kostenaufwand zu entwickeln. Das in dieser Arbeit vorgestellte Parallel‐Reaktorsystem ermöglicht es, innerhalb kurzer Zeit multiple Reaktionen im kostengünstigen 2‐mL‐Maßstab parallel durchzuführen und somit Forschungsergebnisse zeit‐ und kosteneffizient zu generieren. Auf Grund seines reaktorindividuell regelbaren Parameterbereichs bezüglich Reaktionsdruck (0 bis 150 bar), Temperatur (–40 bis +200 °C) und Rührintensität (0 bis 1000 rpm) bietet es ein hohes Maß an Flexibilität. Die Online‐Druckverfolgung gestattet Rückschlüsse auf den Reaktionsfortschritt. Durch die Gewährleistung von Inertgasbedingungen können auch luftempfindliche Substanzen eingesetzt werden. Die Reaktionsabläufe werden mit Hilfe einer graphischen Bedienoberfläche zeitparallel zum Prozessverlauf oder auf Basis eines im Vorfeld geplanten Ablaufs (Kommandoliste) gesteuert.
ConNeCat‐Kompetenznetzwerk Katalyse
Authors: Schleyer D.
Published: July 2006

Das Kompetenznetzwerk Katalyse (ConNeCat) ist im Jahr 2000 als ein durch das Bundesministerium für Bildung und Forschung gefördertes Netzwerk gegründet worden. Es versteht sich als Ideenplattform und Koordinierungsstelle der Katalyseforschung in Deutschland.
Homogen katalysierte stereoselektive Hydrierreaktion im mizellaren Medium
Authors: Schwarze M. , Schomäcker R.
Published: July 2006

Bei der Herstellung von Feinchemikalien und Pharmazeutika werden vermehrt homogene Katalysatoren eingesetzt. Für einen wirtschaftlich nutzbaren Prozess ist es erforderlich, den Katalysator mehrmals wieder zu verwenden. Im Anschluss an eine stereoselektive Hydrierreaktion ist es prinzipiell möglich, zur Katalysatorrückgewinnung die „Micellar Enhanced Ultrafiltration”︁ (MEUF) einzusetzen. Für Membranen mit einem Cutoff von 10 kDa und kleiner zeigen sich Katalysatorrückhalte > 98 %. Bei der Katalysatorrückgewinnung im technischen Maßstab stellt sich die Frage, welcher Rückhalt erreicht werden muss, um das Produkt wirtschaftlich zu erzeugen.
DECHEMA‐Fachsektion Katalyse
Authors: Dittmeyer R.
Published: July 2006

Die DECHEMA‐Fachsektion Katalyse ist ein Zusammenschluss von an der Katalyse interessierten Mitgliedern innerhalb der DECHEMA e.V. Sie arbeitet wettbewerbsneutral und gemeinnützig nach einer von ihr beschlossenen Geschäftsordnung. Sie steht wie jede andere DECHEMA‐Fachsektion jedem Mitglied ohne zusätzliche Beiträge offen. Mitglieder der Fachsektion können natürliche und juristische Personen sein. Letztere benennen für die Fachsektion einen persönlichen Vertreter. Die Mitgliederversammlung wählt einen Vorstand, der die Fachsektion leitet und in nationalen wie internationalen Gremien vertritt. Der Fachsektion stehen die organisatorischen und technischen Einrichtungen der DECHEMA e.V. zur Erfüllung ihrer Aufgaben zur Verfügung. Die Koordinierung erfolgt über die wissenschaftlichen und organisatorischen Betreuer bei der DECHEMA e.V.
Charakterisierung von Katalysatoren
Authors: Albers Peter
Published: July 2006

Vorgestellt werden Beispiele der Nutzung geeigneter Methodenkombinationen, um bestimmte Fragestellungen bei der Charakterisierung typischer Katalysatortypen zu klären. Zudem wird anhand eines aktuellen Beispiels aus der Brennstoffzellenkatalyse die Verknüpfung von Informationen aus heutzutage laborüblichen Methoden mit Techniken der Grundlagenforschung angesprochen. Dabei geht es um die Bestimmung der Adsorptionseigenschaften geträgerter Platin‐Nanopartikel und der Platzbesetzung durch atomaren Wasserstoff unter realistischen Bedingungen.
Formation of Unexpected Selenium‐Rich Compounds by Selenation of the Very Bulky (PhMe2Si)3CLi:s‐Tetraselenane, a Novel Polyseleno Heterocycle
Authors: Klapötke Thomas M. , Krumm Burkhard , Polborn Kurt , Scherr Matthias
Published: July 2006

The reaction of the highly crowded trisilylmethyllithium compound (PhMe2Si)3CLi with elemental selenium resulted in a variety of products, among them the triselane [(PhMe2Si)3CSe]2Se, the unexpected diselane [(PhMe2Si)2HCSe]2and the novel heterocycle [(PhMe2Si)2CSeSe]2. The constitution of the latter could be elucidated from the NMR spectroscopic data and was confirmed by the crystal structure which displays the C2Se4cycle in the twist form. Calculations were performed for the chair and twist conformers of the heterocycles [(H3Si)2CXX]2(X = O, S, Se, Te, Po).
Polyphenylenes and Poly(phenyleneethynylene)s with 9,10‐Anthrylene Subunits
Authors: Yang Changduk , Jacob Josemon , Müllen Klaus
Published: July 2006

Summary: Light‐emitting conjugated polyphenylenes and poly(phenyleneethynylene)s have been synthesized, which comprise of 9,10‐linked anthracene repeat units with branched alkyl side‐chains (2‐octyldecyl) at the 2,6‐positions with p‐terphenyl (P1), p‐diethynylbenzene (P2), and diphenylacetylene (P3) units. Both Sonogashira‐Hagihara and Suzuki‐Miyaura‐type cross‐coupling reactions under palladium catalysis were used as polycondensation methods. The branched alkyl side chains not only improve the solubility of the resulting copolymers but also prevent stacking in the solid state as evident from the almost identical PL spectra in solution and film. The copolymers P1 and P3 display pure blue emission while P2 exhibits green emission due to the extended π‐system along the polymer backbone. All polymers possess high thermal stability and P1 shows the best solubility and film‐forming ability among the three copolymers investigated. Furthermore, the enhanced color stability of this material is demonstrated by the almost identical PL spectra obtained on annealing at 200 °C.

Alternating copolymers P1, P2, and P3.

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Alternating copolymers P1, P2, and P3.
Morphology Characterization of PP/Clay Nanocomposites Across the Length Scales of the Structural Architecture
Authors: Százdi László , Ábrányi Ágnes , Pukánszky Béla , Vancso Julius G. , Pukánszky Béla
Published: July 2006

Summary: The structure and rheological properties of a large number of layered silicate poly(propylene) nanocomposites were studied with widely varying compositions. Morphology characterization at different length scales was achieved by SEM, TEM, and XRD. Rheological measurements supplied additional information about structure. The results showed that these materials possess a very complex structural architecture. The introduction of functionalized polymer decreased the size of the original clay particles and improved their interaction with the polymer matrix. However, relatively large silicate particles were found also in composite samples yielding XRD traces without silicate reflection. XRD supplies information of limited value if the amount of silicate is low, the gallery distance of the stacks is large or their regularity is limited. On the other hand, XRD indicates intercalation well. Although exfoliated individual layers can be detected by TEM, the method cannot be used to draw general conclusions about the structure of layered silicate nanocomposites because of statistical sampling and bias. A large number of individual layers, i.e. large extent of exfoliation, led to the formation of a silicate network structure, which can be detected very sensitively by Cole‐Cole plots of dynamic viscosity. We found that all four morphological entities (particles, intercalated stacks, individual layers, network) may be present simultaneously in the composites. The presence and relative amount must definitely influence composite properties. However, currently used experimental protocols do not supply sufficient information even to estimate the relative influence as well as interplay among different structural features quantitatively. We may conclude, however, that XRD and TEM alone are not sufficient for the characterization of nanocomposites with a complex structure.

Possible network formation of silicate sheets at small clay and large MAPP content.

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Possible network formation of silicate sheets at small clay and large MAPP content.
Temperature‐Sensitive Hydrogel Pattern by Electron‐Beam Lithography
Authors: Schmidt Thomas , Mönch Jens Ingolf , Arndt Karl‐Friedrich
Published: July 2006

Summary: Cross‐linking of water‐soluble polymers by high‐energy irradiation provides a clean method for the synthesis of hydrogels. Some applications of stimuli‐sensitive polymers need different patterns in the micro‐ and submicrometer range on a supporting material. A dry layer of poly(vinyl methyl ether) on a Si‐wafer was cross‐linked and patterned by irradiation with the electron beam of a modified electron microscope. The patterns in the micro‐ and submicrometer range show good adhesion on the supporting material without adhesion promoter. The deformation and the elastic behavior of the pattern were tested by AFM. The formed gel structures were sensitive against changes in environmental condition. This offers a wide range of applications.

AFM image of the logo “Technische Universität Dresden” generated by line‐irradiation.

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AFM image of the logo “Technische Universität Dresden” generated by line‐irradiation.
Relationships Between Birefringence of Constituent Fibers and Properties of Thermally Bonded Nonwovens
Authors: Wang Xiao Yan , Gong Rong Hua
Published: July 2006

Summary: Three‐dimensional nonwoven fabrics have been produced using a newly developed air‐laid web forming and through‐air thermal‐bonding process directly from commercial PP/polyester (sheath/core) bi‐component staple fibers. Following the previous study on the morphology and structure of constituent fibers, this paper reports the breaking force and abrasion resistance of the fabrics. Results indicate that the relationships between both the breaking strength and abrasion resistance of the samples, and the thermal‐bonding process conditions are similar to each other. The appropriate thermal‐bonding temperature and dwell time are critical for achieving fabrics with high breaking strength and abrasion resistance. Such relationships are inconsistent with those between the tensile strength of the constituent fiber reflected by the birefringence and the thermal‐bonding process conditions. The birefringence of the constituent fiber appears to decrease with increasing thermal‐bonding temperature and dwell time. These results provide evidence that both the breaking force and abrasion resistance for the thermally bonded nonwoven fabrics are governed not only by the mechanical properties of constituent fibers, but also by the bonding properties between the fibers.

Abrasion mass loss and breaking force of fabric and birefringence of constituent fiber for the thermally bonded nonwoven samples as functions of the dwell time.

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Abrasion mass loss and breaking force of fabric and birefringence of constituent fiber for the thermally bonded nonwoven samples as functions of the dwell time.
Preparation and Characterization of Hybrid Chitosan/Acrylic Resin Emulsions and Their Films
Authors: Wada Tamaki , Uragami Tadashi
Published: July 2006

Summary: Solutions containing chitosan of different molecular weights and several acidic monomers were prepared under various aging conditions. Hybrid chitosan/acrylic resin emulsions were prepared from these solutions by emulsion polymerization. The viscosities of the hybrid chitosan/acrylic resin emulsions were influenced significantly by the molecular weight of chitosan, the acidic monomer used, and the aging conditions. DSC and FT‐IR spectroscopy of the hybrid chitosan/acrylic resin films indicated that chitosan was well distributed in the films. The water absorption and formaldehyde adsorption abilities of the acrylic resin films prepared with chitosan were higher than the corresponding films prepared without chitosan, and they increased with increasing molecular weight of the chitosan. The morphology of these films, studied by TEM, revealed that the distribution of chitosan in the hybrid chitosan/acrylic resin emulsion was dependent on the molecular weight of chitosan, the acidic monomer used, and the aging conditions.

Chitosan salts with acrylic acid (R = CHCH2), methacrylic acid (R = C(CH3)CH2) and itaconic acid (R = CH2(COOH)CCH2).

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Chitosan salts with acrylic acid (R = CHCH2), methacrylic acid (R = C(CH3)CH2) and itaconic acid (R = CH2(COOH)CCH2).
Static and Dynamic Mechanical Properties of Vinylester Resin Matrix Composites Filled with Fly Ash
Authors: Ray Dipa , Bhattacharya Debadrita , Mohanty Amar K. , Drzal Lawrence T. , Misra Manjusri
Published: July 2006

Summary: Vinylester resin matrix composites were prepared with a fly ash loading of 30, 40, 50 and 60 wt.‐%. Flexural properties of the composites were investigated. It was found that the flexural strength was lowered in all the filled composites, but the flexural modulus showed a significant increase of 10, 57, 112% in case of 30, 40 and 50 wt.‐% fly‐ash‐loaded composites respectively, compared to the neat resin. However, there was a decrease in the mechanical properties in case of 60 wt.‐% fly‐ash‐filled composites. The dynamic mechanical analysis was carried out to obtain information about the matrix‐filler interaction at the interface. The storage modulus value at room temperature was highest for the 50 wt.‐% fly‐ash‐filled composites, corroborating with the observed flexural modulus value. The fractured surfaces were examined under SEM and were correlated with the mechanical properties.

Large voids evident in the 60 wt.‐% fly‐ash‐filled composites.

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Large voids evident in the 60 wt.‐% fly‐ash‐filled composites.
Enhanced Interfacial Adhesion of Bioflour‐Filled Poly(propylene) Biocomposites by Electron‐Beam Irradiation
Authors: Kim Hee‐Soo , Kim Sumin , Kim Hyun‐Joong
Published: July 2006

Summary: The effect of electron‐beam (EB) irradiation on interfacial adhesion in bioflour (rice‐husk flour, RHF)‐filled poly(propylene) (PP) biocomposites in which either only the RHF had been EB irradiated or the whole biocomposite had been EB irradiated was examined at different EB‐irradiation doses. The tensile strengths of PP–RHF biocomposites with EB‐irradiated RHF and EB‐irradiated PP and PP–RHF biocomposites were slightly higher than those of the nonirradiated samples. The improved interfacial adhesion of PP–RHF biocomposites with EB radiated RHF and the EB‐irradiated PP–RHF biocomposites compared with the nonirradiated samples was confirmed by the morphological characteristics. In addition, the thermal stability of EB‐treated biocomposites was slightly higher than those of nonirradiated samples at the irradiation doses of 2 and 5 Mrad. However, at the high irradiation dose (30 Mrad), the tensile strengths of the biocomposites were slightly decreased by main‐chain scission (degradation) of PP and RHF. Attenuated total reflectance FT‐IR and X‐ray‐photoelectron‐spectroscopy findings confirmed this result by showing that that EB irradiation changed the functional groups of RHF, PP, and the biocomposites and improved the surface characteristics of the biocomposites. The thermal characteristics of the EB‐irradiated PP and biocomposites were investigated using differential scanning calorimetry. From the results, we concluded that use of low‐dose EB radiation increases the interfacial adhesion between matrix polymer and biofiller.

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