bluuebunny/crossref_metadata_2025_split huggingface dataset:
High‐Temperature Chlorination‐Reduction Sequence for the Preparation of Silicon Hydride Modified Silica Surfaces
Authors: Plumeré Nicolas , Speiser Bernd , Mayer Hermann A. , Joosten Dominik , Wesemann Lars 
Published: December 2008

AbstractA general method for the functionalization of silica surfaces with silicon hydride (Si–H) groups is described for four different preparations of silica. The silica surface is reduced in a two‐step chlorination–reduction procedure within a simple gas‐flow system at high temperatures. After initial dehydroxylation of the silica surface, silicon chloride groups are formed by the reaction with thionyl chloride. The chlorination activates otherwise inaccessible surface siloxane moieties. A high silicon–hydride surface concentration results from the subsequent reduction of the chlorinated surface with hydrogen. The physical properties of the resulting silica are analyzed using scanning electron microscopy, as well as dynamic light scattering and Brunauer–Emmet–Teller measurements. The chlorination–reduction sequence has no significant impact on the structure, surface area and mesopore size of the silica materials used. The surface of the materials is characterized by diffuse reflectance infrared Fourier transform (DRIFT) and 29Si CP/MAS NMR spectroscopy. The silicon–hydride groups are mostly of the ${{\rm T}{{3\hfill \atop {\rm H}\hfill}}}$‐type. The use of high temperatures (>800 °C) results in the condensation of internal and surface silanol groups. Therefore, materials with both a fully condensed silica matrix as well as a surface free of silanol groups are obtained. The materials are ideal precursors for further molecular silica surface modification, as demonstrated with a ferrocene derivative.
Chirality in the Absence of Rigid Stereogenic Elements: The Design of Configurationally Stable C3‐Symmetric Propellers
Authors: Benincori Tiziana , Marchesi Andrea , Pilati Tullio , Ponti Alessandro , Rizzo Simona , Sannicolò Francesco 
Published: December 2008

AbstractResidual stereoisomerism is a form of stereoisomerism scarcely considered so far for applicative purposes, though extremely interesting, since the production of stereoisomers does not involve classical rigid stereogenic elements. In three‐bladed propeller‐shaped molecules, a preferred stereomerization mechanism, related to the correlated rotation of the rings, allows the free interconversion of stereoisomers inside separated sets (the residual stereoisomers) that can interconvert through higher energy pathways. In light of possible future applications as chiral ligands for transition metals in stereoselective processes, some C3‐symmetric phosphorus‐centered propellers, which could exist as residual enantiomers, are synthesized and the possibility of resolving their racemates into residual antipodes is explored. While the tris(aryl)methanes are configurationally stable at room temperature, only selected tris(aryl)phosphane oxides display a configurational stability high enough to allow resolution by HPLC on a chiral stationary phase (CSP HPLC) at a semipreparative level at room temperature. Stability was evaluated through different techniques (circular dichroism (CD) signal decay, dynamic CSP HPLC (CSP DHPLC), dynamic NMR analysis (DNMR)) and the results compared and discussed. Phosphanes were found much less stable than the corresponding phosphane oxides, for which preliminary calculations suggest that the three‐ring‐flip enantiomerization mechanism (M0) would be easier than phosphorus pyramidal inversion. The parameters affecting the configurational stability of the residual enantiomers of C3‐symmetric propellers are discussed.
Lewis Acid or Brønsted Acid Catalyzed Reactions of Vinylidene Cyclopropanes with Activated Carbon–Nitrogen, Nitrogen–Nitrogen, and Iodine–Nitrogen Double‐Bond‐Containing Compounds
Authors: Lu Jian‐Mei , Zhu Zhi‐Bin , Shi Min 
Published: December 2008

AbstractLewis acid or Brønsted acid catalyzed reactions of vinylidene cyclopropanes (VDCPs), 1, with activated carbon–nitrogen, nitrogen–nitrogen, and iodine–nitrogen double‐bond‐containing compounds have been thoroughly investigated. We found that pyrrolidine and 1,2,3,4‐tetrahydroquinoline derivatives can be formed in good yields in the reactions of VDCPs 1 with ethyl (arylimino)acetates 2 by a [3+2] cycloaddition or intramolecular Friedel–Crafts reaction pathway. Based on these results, we found that activated carbon–nitrogen and nitrogen–nitrogen double‐bond‐containing compounds, such as N‐toluene‐4‐sulfonyl (N‐Ts) imines 5 and diisopropylazodicarboxylate (7), can also react with VDCPs 1 to give [3+2] cycloaddition products in moderate to good yields in the presence of a Lewis acid. When N‐tert‐butoxycarbonyl aldimine 9 was used as the substrate, six‐membered cycloaddition products 10 and 11 were formed in moderate yields in the presence of a Brønsted acid, trifluoromethanesulfonic acid (TfOH). The reactions of VDCPs 1 with N‐Ts‐iminophenyliodinane (12) were also carried out in the presence of (CuOTf)2⋅C6H6 and it was found that nitrogen‐containing indene derivatives 13 were obtained, rather than the aziridination products. Plausible mechanisms for all of these transformations are discussed, based on the obtained results.
Complexation between Methyl Viologen (Paraquat) Bis(Hexafluorophosphate) and Dibenzo[24]Crown‐8 Revisited
Authors: Gasa Travis B. , Spruell Jason M. , Dichtel William R. , Sørensen Thomas J. , Philp Douglas , Stoddart J. Fraser , Kuzmič Petr 
Published: December 2008

AbstractParaquat bis(hexafluorophosphate) undergoes stepwise dissociation in acetone. All three species—the neutral molecule, and the mono‐ and dications—are represented significantly under the experimental conditions typically used in host–guest binding studies. Paraquat forms at least four host–guest complexes with dibenzo[24]crown‐8. They are characterized by both 1:1 and 1:2 stoichiometries, and an overall charge of either zero (neutral molecule) or one (monocation). The monocationic 1:1 host–guest complex is the most abundant species under typical (0.5–20 mM) experimental conditions. The presence of the dicationic 1:1 host–guest complex cannot be excluded on the basis of our experimental data, but neither is it unambiguously confirmed to be present. The two confirmed forms of paraquat that do undergo complexation—the neutral molecule and the monocation—exhibit approximately identical binding affinities toward dibenzo[24]crown‐8. Thus, the relative abundance of neutral, singly, and doubly charged pseudorotaxanes is identical to the relative abundance of neutral, singly, and doubly charged paraquat unbound with respect to the crown ether in acetone. In the specific case of paraquat/dibenzo[24]crown‐8, ion‐pairing does not contribute to host–guest complex formation, as has been suggested previously in the literature.
ChemInform Abstract: Mg2Cl‐5 and Mg3Cl‐7 Superhalogen Anions.
Authors: Anusiewicz Iwona 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Co2As2O5 — The First Cobalt(II)—Arsenate(III).
Authors: Loesel Stefan , Hillebrecht Harald 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: BaIrIn4 and Ba2Ir4In13: Two In‐Rich Polar Intermetallic Structures with Different Augmented Prismatic Environments about the Cations.
Authors: Palasyuk Andriy M. , Corbett John D. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Controlled Synthesis and Optical Properties of Colloidal Ternary Chalcogenide CuInS2 Nanocrystals.
Authors: Zhong Haizheng , Zhou Yi , Ye Mingfu , He Youjun , Ye Jianping , He Chang , Yang Chunhe , Li Yongfang 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electronic Structure and Physical Properties of Hf5Sb9 Containing a Unique T Net of Sb Atoms.
Authors: Xu Jianxiao , Kleinke Katja M. , Kleinke Holger 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Strontium Isopoly Tungstates: Synthesis and Properties.
Authors: Rozantsev G. M. , Radio S. V. , Gumerova N. I. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ln‐Site Substitution Effect on the Oxygen‐Storage Capability of LnBaCo4O7+δ.
Authors: Kadota S. , Karppinen M. , Motohashi T. , Yamauchi H. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Solid‐ and Solution Phase Transformations in Novel Hybrid Iodoplumbate Derivatives Templated by Solvated Yttrium Complexes.
Authors: Mishra Shashank , Jeanneau Erwann , Daniele Stephane , Ledoux Gilles , Swamy Prakash N. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Microporous Vanadyl‐Arsenate with the Template Incorporated Exhibiting Sorption and Catalytic Properties.
Authors: Berrocal Teresa , Mesa Jose L. , Pizarro Jose L. , Bazan Begona , Iglesias Marta , Aguayo Andres T. , Arriortua Maria I. , Rojo Teofilo 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Transition of Classic Decatungstate to Paratungstate: Synthesis, Structure and Luminescence Properties of Two Paratungstate‐Based 3‐D Compounds.
Authors: Yuan Ling , Qin Chao , Wang Xinlong , Li Yangguang , Wang Enbo 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Layered Thiostannate (dienH2)Cu2Sn2S6: A Photoconductive Inorganic—Organic Hybrid Compound.
Authors: Pienack Nicole , Puls Angela , Naether Christian , Bensch Wolfgang 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Theoretical Insights into Enantioselective Catalysis: The Mechanism of the Kharasch—Sosnovsky Reaction.
Authors: Mayoral Jose Antonio , Rodriguez‐Rodriguez Sergio , Salvatella Luis 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile and Highly Efficient Synthesis of Fluorinated Heterocycles via Prins Cyclization in Ionic Liquid Hydrogen Fluoride Salts
Authors: Kishi Yuichiro , Nagura Hirokatsu , Inagi Shinsuke , Fuchigami Toshio 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Fluorine‐Containing Heterocycles. Part 17. (Tetrafluorobenzoyl)thioureas in the Synthesis of Fluorine‐Containing Azaheterocycles.
Authors: Lipunova G. N. , Nosova E. V. , Laeva A. A. , Trashakhova T. V. , Slepukhin P. A. , Charushin V. N. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: PtCl2‐Catalyzed Tandem Triple Migration Reaction Toward (Z)‐1,5‐Dien‐2‐yl Esters.
Authors: Ji Ke‐Gong , Shu Xing‐Zhong , Chen Jin , Zhao Shu‐Chun , Zheng Zhao‐Jing , Lu Li , Liu Xue‐Yuan , Liang Yong‐Min 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Aerobic Oxidation of Alcohols under Mild Conditions Catalyzed by Novel Polymer‐Incarcerated, Carbon‐Stabilized Gold Nanoclusters.
Authors: Lucchesi Celine , Inasaki Takeshi , Miyamura Hiroyuki , Matsubara Ryosuke , Kobayashi Shu 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile Iodination of Aromatic Compounds Having Electron‐Withdrawing Substituents. Generation of Triiodine Cation in the System Tetra‐N‐iodoglycoluril—Iodine—Sulfuric Acid.
Authors: Chaikovskii V. K. , Funk A. A. , Filimonov V. D. , Petrenko T. V. , Kets T. S. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Revision for the Synthesis of β‐Enaminones in Solvent Free Conditions: Efficacy of Different Supported Heteropoly Acids as Active and Reusable Catalysts.
Authors: Rafiee Ezzat , Joshaghani Mohammad , Eavani Sara , Rashidzadeh Solmaz 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Novel Salt‐Free Ruthenium‐Catalyzed Alkylation of Aryl Amines.
Authors: Hollmann Dirk , Baehn Sebastian , Tillack Annegret , Parton Rudy , Altink Rinke , Beller Matthias 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Platinum‐Catalyzed 1,4‐Addition of Arylboronic Acids to β‐Substituted α,β‐Unsaturated Ketones.
Authors: Hayashi Tamio , Sasaki Keigo 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Transition‐Metal‐Catalyzed Chemoselective Methylenation of Dicarbonyl Substrates.
Authors: Lebel Helene , Davi Michael , Stoklosa Grzegorz T. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation of Linearly Fused 6‐6‐5 and 6‐5‐5 Carbotricyclic Ring Systems Related to the Natural Polyquinanes.
Authors: Sagamanova Irina K. , Tumanov Vasily V. , Smit William A. , Zatonsky Georgy V. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Pyrimidinocyclophanes Having a Bridging Nitrogen Atom
Authors: Semenov V. E. , Nikolaev A. E. , Kozlov A. V. , Efremov Yu. Ya. , Latypov Sh. K. , Reznik V. S. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereoselective Synthesis of Tri‐ and Tetrasubstituted Alkenes by Iron‐Catalyzed Carbometalation Ring‐Opening Reactions of Cyclopropenes.
Authors: Wang Yi , Fordyce Euan A. F. , Chen Fung Yan , Lam Hon Wai 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Constructing the OCF2O Moiety Using BrF3.
Authors: Hagooly Youlia , Rozen Shlomo 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: [2 + 2] Cycloaddition Reaction of Alkyl Enol Ethers with Acrylates by in situ Generated Silyl Triflic Imide Catalyst.
Authors: Takasu Kiyosei , Miyakawa Yuta , Ihara Masataku , Tokuyama Hidetoshi 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Nitroso‐ and Amino Derivatives of N‐Arylaminoalkyladamantanes.
Authors: Semichenko E. S. , Gomonova A. L. , Gavrilova N. A. , Suboch G. S. 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Short Synthesis of α‐Allenic Alcohols from α,β‐Unsaturated Carbonyl Compounds with Dichloromethyl p‐Tolyl Sulfoxide.
Authors: Satoh Tsuyoshi , Noguchi Takafumi , Miyagawa Toshifumi 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Sonogashira Couplings of Aryl Bromides: Room Temperature, Water Only, No Copper.
Authors: Lipshutz Bruce H. , Chung David W. , Rich Brian 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Efficient Amine Organocatalysts Based on Bispidine for the Asymmetric Michael Addition of Ketones to Nitroolefins.
Authors: Yang Zhigang , Liu Jie , Liu Xiaohua , Wang Zhen , Feng Xiaoming , Su Zhishan , Hu Changwei 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Catalytic Asymmetric Alkylation of Aldehydes by Using Trialkylboranes.
Authors: Ukon Takahiro , Harada Toshiro 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Catalytic Enantioselective Addition of Diethylzinc to Trifluoromethyl Ketones.
Authors: Yearick Kimberly , Wolf Christian 
Published: December 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.