bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mechanisms of Singlet‐Oxygen and Superoxide‐Ion Generation by Porphyrins and Bacteriochlorins and their Implications in Photodynamic Therapy
Authors: Silva Elsa F. F. , Serpa Carlos , Dąbrowski Janusz M. , Monteiro Carlos J. P. , Formosinho Sebastião J. , Stochel Grazyna , Urbanska Krystyna , Simões Sérgio , Pereira Mariette M. , Arnaut Luis G. 
Published: June 2010

AbstractNew halogenated and sulfonated bacteriochlorins and their analogous porphyrins are employed as photosensitizers of singlet oxygen and the superoxide ion. The mechanisms of energy and electron transfer are clarified and the rates are measured. The intermediacy of a charge‐transfer (CT) complex is proved for bacteriochlorins, but excluded for porphyrins. The energies of the intermediates and the rates of their interconversions are measured, and are used to obtain the efficiencies of all the processes. The mechanism of formation of the hydroxyl radical in the presence of bacteriochlorins is proposed to involve a photocatalytic step. The usefulness of these photosensitizers in the photodynamic therapy (PDT) of cancer is assessed, and the following recommendations are given for the design of more effective PDT protocols employing such photosensitizers: 1) light doses should be given over a more extended period of time when the photosensitizers form CT complexes with molecular oxygen, and 2) Fe2+ may improve the efficiency of such photosensitizers if co‐located in the same cell organelle assisting with an in vivo Fenton reaction.
Electroactive Benzothiazole Hydrazones and Their [Mo6O19]2− Derivatives: Promising Building Blocks for Conducting Molecular Materials
Authors: Gatard Sylvain , Blanchard Sébastien , Schollhorn Bernd , Gouzerh Pierre , Proust Anna , Boubekeur Kamal 
Published: June 2010

AbstractThe electroactive benzothiazole hydrazone AMBTH–H2, a new member of the 2,2′‐azino‐bis(N‐alkylbenzothiazole) family, was synthesised in a five‐step procedure and characterised by using X‐ray diffraction along with two intermediates and the N‐methylbenzothiazole hydrazone MBTH–H2. Both AMBTH–H2 and MBTH–H2 were coupled to [Mo6O19]2− in acetonitrile in the presence of dicyclohexylcarbodiimide and dimethylaminopyridine to give two new diazoalkane–hexamolybdates, which were isolated as tetrabutylammonium salts and characterised by using IR, UV/Vis and NMR spectroscopies, cyclic voltammetry and, for one of them, X‐ray diffraction. The packing arrangement molecules in crystals of AMBTH–H2, the redox features of the AMBTH–hexamolybdate hybrid together with a good electronic communication between the organic π system and the molybdenum centres make these compounds very promising blocks for the synthesis of conducting molecular materials.
Effect of the Nature of the Substituent in N‐Alkylimidazole Ligands on the Outcome of Deprotonation: Ring Opening versus the Formation of N‐Heterocyclic Carbene Complexes
Authors: Huertos Miguel A. , Pérez Julio , Riera Lucía , Díaz Jesús , López Ramón 
Published: June 2010

AbstractComplexes [Re(CO)3(N‐RIm)3]OTf (N‐RIm=N‐alkylimidazole, OTf=trifluoromethanesulfonate; 1 a–d) have been straightforwardly synthesised from [Re(OTf)(CO)5] and the appropriate N‐alkylimidazole. The reaction of compounds 1 a–d with the strong base KN(SiMe3)2 led to deprotonation of a central CH group of an imidazole ligand, thus affording very highly reactive derivatives. The latter can evolve through two different pathways, depending on the nature of the substituents of the imidazole ligands. Compound 1 a contains three N‐MeIm ligands, and its product 2 a features a C‐bound imidazol‐2‐yl ligand. When 2 a is treated with HOTf or MeOTf, rhenium N‐heterocyclic carbenes (NHCs) 3 a or 4 a are afforded as a result of the protonation or methylation, respectively, of the non‐coordinated N atom. The reaction of 2 a with [AuCl(PPh3)] led to the heterobimetallic compound 5, in which the N‐heterocyclic ligand is once again N‐bound to the Re atom and C‐coordinated to the gold fragment. For compounds 1 b–d, with at least one N‐arylimidazole ligand, deprotonation led to an unprecedented reactivity pattern: the carbanion generated by the deprotonation of the C2H group of an imidazole ligand attacks a central CH group of a neighbouring N‐RIm ligand, thus affording the product of CC coupling and ring‐opening of the imidazole moiety that has been attacked (2 c, d). The new complexes featured an amido‐type N atom that can be protonated or methylated, thus obtaining compounds 3 c, d or 4 c, d, respectively. The latter reaction forces a change in the disposition of the olefinic unit generated by the ring‐opening of the N‐RIm ligand from a cisoid to a transoid geometry. Theoretical calculations help to rationalise the experimental observation of ring‐opening (when at least one of the substituents of the imidazole ligands is an aryl group) or tautomerisation of the N‐heterocyclic ligand to afford the imidazol‐2‐yl product.
First Dinuclear Copper/Gallium Complexes: Supporting Cu0 and CuI Centres by Low‐Valent Organogallium Ligands
Authors: Bollermann Timo , Prabusankar Ganesan , Gemel Christian , Seidel Rüdiger W. , Winter Manuela , Fischer Roland A. 
Published: June 2010

AbstractThe synthesis and structural characterisation of low‐valent dinuclear copper(I) and copper(0) complexes supported by organogallium ligands has been accomplished for the first time by the reductive coordination reaction of [GaCp*] (Cp*=pentamethylcyclopentadienyl) and [Ga(ddp)] (ddp=HC(CMeNC6H3‐2,6‐iPr2)2 2‐diisopropylphenylamino‐4‐diisopropylphenylimino‐2‐pentene) with readily available copper(II) and copper(I) precursors. The treatment of CuBr2 and Cu(OTf)2 (OTf=CF3SO3) with [Ga(ddp)] under mild conditions resulted in elimination of [Ga(L)2(ddp)] (L=Br, OTf) and afforded the novel gallium(I)/copper(I) compounds [{(ddp)GaCu(L)}2] (L=Br (1), OTf (2)). The single‐crystal X‐ray structure determinations of 1 and 2 reveal that these molecules are composed of {(ddp)GaCu(L)} dimeric units, with planar CuIGaI four‐membered rings and short CuI⋅⋅⋅CuI distances, with 2 exhibiting the shortest CuI⋅⋅⋅CuI contact reported to date of 2.277(3) Å. The all‐gallium coordinated dinuclear [Cu2(GaCp*)(μ‐GaCp*)3Ga(OTf)3] (3) is formed when Cu(OTf)2 is combined with [GaCp*] instead of [Ga(ddp)]. Notably, in the course of this redox reaction Lewis acidic Ga(OTf)3 is formed, which coordinates to one of the electron‐rich copper(0) centres. Compound 3 is suggested as the first case of a structurally characterised complex of copper(0). By changing the copper(II) to a copper(I) source, that is, [Cu(cod)2][OTf] (cod=1,5‐cyclooctadiene), the salt [Cu2(GaCp*)3(μ‐GaCp*)2][OTf]2 (4) is formed, the cationic part of which is related to previously described isoelectronic dinuclear d10 complexes of the type [M2(GaCp*)5] (M=Pd, Pt).
An Alternative Mechanistic Concept for Homogeneous Selective Ethylene Oligomerization of Chromium‐Based Catalysts: Binuclear Metallacycles as a Reason for 1‐Octene Selectivity?
Authors: Peitz Stephan , Aluri Bhaskar R. , Peulecke Normen , Müller Bernd H. , Wöhl Anina , Müller Wolfgang , Al‐Hazmi Mohammed H. , Mosa Fuad M. , Rosenthal Uwe 
Published: June 2010

AbstractAn alternative concept for the selective catalytic formation of 1‐octene from ethylene via dimeric catalytic centers is proposed. The selectivity of the tetramerization systems depends on the capability of ligands to form binuclear complexes that subsequently build up and couple two separate metallacyclopentanes to form 1‐octene selectively. Comparison of existing catalytic processes, the ability of the bis(diarylphosphino)amine (PNP) ligand to bridge two metal centers, and the experimental background support the proposed binuclear mechanism for ethylene tetramerization.
Imination of Sulfides and Sulfoxides with Sulfonylimino‐λ3‐Bromane under Mild, Metal‐Free Conditions
Authors: Ochiai Masahito , Naito Masao , Miyamoto Kazunori , Hayashi Satoko , Nakanishi Waro 
Published: June 2010

AbstractExposure of sulfides and sulfoxides to trifluoromethanesulfonylimino(aryl)‐λ3‐bromane in dichloromethane at 0 °C results in a facile transfer of the sulfonylimino group to sulfur atoms and affords N‐triflylsulfilimines and ‐sulfoximines in high yields under transition‐metal‐free conditions. Imination of (R)‐methyl p‐tolyl sulfoxide proceeded with predominant retention of configuration at the stereogenic sulfur center. The Hammett plot afforded ρ values of −0.58 for para‐substituted thioanisoles and −0.49 for their equivalent sulfoxides, which suggests a buildup of positive charge on the sulfur atoms of sulfides and sulfoxides in the transition state. Calculations suggest a bimolecular nucleophilic‐substitution mechanism on the negatively charged nitrogen atom of the sulfonylimino‐λ3‐bromane, which involves the attack of a sulfide from the opposite side to bromine(III).
Proton‐Transfer Reactions on Hexanuclear Platinum Clusters: Reversible Heterolytic Cleavage of H2 and CH Activation Affording a Linear, Cluster‐Containing Polymer
Authors: Leoni Piero , Marchetti Lorella , Bonuccelli Veronica , Mohapatra Swagat K. , Albinati Alberto , Rizzato Silvia 
Published: June 2010

AbstractThe hexanuclear cluster {Pt6}H2 (2) contains a sterically hindered and chemically stable {Pt6}=Pt6(μ‐PtBu2)4(CO)4 core, with the six metals forming an edge‐bridged tetrahedron. The two hydrides are the reactive sites of the cluster and lie on opposite sides of the cluster, terminally bonded to the two “apical” edge‐bridging platinum centres. Indeed, cluster 2 reacts with acids of different acidity (HA=CF3SO3H, HBF4, p‐CH3C6H4SO3H, CF3COOH, PhCOOH and CH3COOH), affording, after evolution of two equivalents of dihydrogen, the corresponding anion‐substituted clusters {Pt6}A2 (4). We suggest that the reaction proceeds through a mechanism similar to the one generally accepted for the analogous protonation of mononuclear hydrides, with some of the intermediates partially characterised at low temperature. Interestingly, the reverse reaction, the heterolytic splitting of H2 by clusters 4, occurs readily under mild conditions. The anions in clusters 4 a and 4 b (4 a: A=CF3SO3, 4 b: A=BF4) are bonded in the solid state but very easily dissociate in solution and may be substituted under mild conditions by weak ligands, such as CH2Cl2 or CH3CN. With dialkyl ethers, the reaction proceeds further with the heterolytic splitting of a CH bond of the ethereal ligand. This process allowed us to isolate the polymer [{Pt6}(CH2OCH2CH2OCH2)]x (8), in which the {Pt6} cluster units are connected by insulating spacers arising from dimethoxyethane. The results of single‐crystal X‐ray diffraction studies on 4 a and 8 are also reported.
ChemInform Abstract: LiLa2F3(SO4)2 and LiEr2F3(SO4)2: Fluoride‐Sulfates of the Rare‐Earth Elements with Lithium.
Authors: Wickleder Mathias S. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Polar [WO2F4]2‐ Anion in the Solid State.
Authors: Heier Kevin R. , Norquist Alexander J. , Halasyamani P. Shiv , Duarte Angel , Stern Charlotte L. , Poeppelmeier Kenneth R. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Sm3Cl[SiO4]2: A Chlorine‐Poor Chloride Orthosilicate of Samarium.
Authors: Sieke Corinna , Schleid Thomas 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Rb5Hg19: A New Defect Variant of the BaAl4 Structure Type.
Authors: Biehl E. , Deiseroth H. J. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Stereochemistry of the Addition Products of Phenoxide and Cresoxide Ions to Methyl 3‐Arylpropynoates.
Authors: Hamed Ezzat A. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Electrodeposition of CdTe Films from Ammoniacal Alkaline Aqueous Solution at Low Cathodic Overpotentials.
Authors: Murase Kuniaki , Uchida Hidenori , Hirato Tetsuji , Awakura Yasuhiro 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Ln2Al3Si2 (Ln: Ho, Er, Tm): New Silicides from Molten Aluminum—Determination of the Al/Si Distribution with Neutron Crystallography and Metamagnetic Transitions.
Authors: Chen Xian‐Zhong , Sieve Bradley , Henning Robert , Schultz Arthur J. , Brazis Paul , Kannewurf Carl R. , Cowen Jerry A. , Crosby Richard , Kanatzidis Mercouri G. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 1‐Alkylated Pteridine, C15H19ClN6O3.
Authors: Helliwell Madeleine , Dinsmore Andrew , Garner C. David , Joule John A. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 First Tridentate Ligand for Catalytic Enantioselective Aza‐Claisen Rearrangement of Allylic Imidates.
Authors: Jiang Yutong , Longmire James M. , Zhang Xumu 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Conjugate Addition of Lithium Enolates to Aromatic Carbonyl Compounds Complexed with Aluminum Tris(2,6‐diphenylphenoxide) (ATPH).
Authors: Saito Susumu , Sone Toshihiko , Shimada Kazuto , Yamamoto Hisashi 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Anellated 1,2,3‐Selena‐ or ‐Thiadiazoles.
Authors: Reddy D. Bhaskar , Reddy A. Somasekhar , Padmavathi V. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Photoinduced Decarboxylation of Aryl‐Substituted Carboxylic Acids Using HgO. A New Photo‐Kolbe Reaction Pathway.
Authors: Habibi Mohammad H. , Farhadi Saeid 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Uncatalyzed Hydrogen‐Transfer Reductions of Aldehydes and Ketones.
Authors: Bagnell Laurence , Strauss Christopher R. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Reactions of Alkynylselenonium Salts with Tetrabutylammonium Halides: Apparent Umpolung of Alkynyl Moiety.
Authors: Kataoka Tadashi , Watanabe Shin‐ichi , Yamamoto Keiichirou 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Conversion of 2‐(Trimethylsilyl)ethyl Sulfides into Thioesters.
Authors: Grundberg Hans , Andergran Magnus , Nilsson Ulf J. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Novel Synthesis of Functionalized Cyclobutane Derivatives via Intramolecular Conjugate Addition of Alkenyltrimethylstannane Functions to α,β‐Alkynic Esters Mediated by Copper(I) Chloride.
Authors: Piers Edward , Boehringer Eva M. , Yee James G. K. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 (.+‐.)‐Rosaprostol.
Authors: Mikolajczyk Marian , Zurawinski Remigiusz 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Rodlike Dispiro Hydrocarbon Skeletons for New Liquid Crystal Compounds.
Authors: Feuerbacher Nina , Voegtle Fritz , Windscheidt Jens , Poetsch Eike , Nieger Martin 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Palladium‐Catalyzed N‐Allylation of Anilines by Direct Use of Allyl Alcohols in the Presence of Titanium(IV) Isopropoxide.
Authors: Yang Shyh‐Chyun , Chung Wen‐Hung 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Modified Bouveault Reaction for the Preparation of α,α‐Dimethylamines from Amides.
Authors: Denton Stephen M. , Wood Anthony 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Two‐Carbon Homologation of Aldehydes via Silyl Ketene Acetals: A New Stereoselective Approach to (E)‐Alkenoic Acids.
Authors: Bellassoued Moncef , Lensen Nathalie , Bakasse Mina , Mouelhi Sinda 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Phase‐Transfer Allylation of Phenylacetic Acid N‐Ethylamide.
Authors: Mijin D. Z. , Stojanovic N. D. , Petrovic S. D. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 tert‐Butyl Sulfoximine Group as an Effective ortho‐Director of Lithiation: ortho‐Metalated S‐(tert‐Butyl)‐S‐phenylsulfoximines.
Authors: Levacher V. , Langer Eriksen B. , Begtrup M. , Dupas G. , Queguiner G. , Duflos J. , Bourguignon J. 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Dichloro[(2‐dimethylamino)propyldiphenylphosphine]palladium(II) (PdCl2(alaphos)): An Efficient Catalyst for Cross‐Coupling of Aryl Triflates with Alkynyl Grignard Reagents.
Authors: Kamikawa Takashi , Hayashi Tamio 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Asymmetric Benzopentaannulation from Tungsten ((‐)‐Menthyloxy)(aryl)carbene Complexes, Alkynyllithiums, and Methyl Triflate.
Authors: Barluenga Jose , Trabanco Andres A. , Florez Josefa , Garcia‐Granda Santiago , LLorca Maria‐Amparo 
Published: June 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.