bluuebunny/crossref_metadata_2025_split huggingface dataset:
Factors Relevant for the Ruthenium–Benzylidene‐Catalyzed Cyclopolymerization of 1,6‐Heptadyines
Authors: Krause Jens O. , Nuyken Oskar , Buchmeiser Michael R. 
Published: April 2004

AbstractFourteen metathesis initiators that had been designed for use in the living polymerization of diethyl dipropargylmalonate (DEDPM), including the Hoveyda catalyst [RuCl2(IMesH2)(CH‐2‐(2‐PrO)C6H4)] (1 a), as well as [Ru(CF3COO)2(IMesH2)(CH‐2‐(2‐PrO)C6H4)] (1 b), [Ru(CF3CF2COO)2(IMesH2)(CH‐2‐(2‐PrO)C6H4)] (1 c), [Ru(CF3CF2CF2COO)2(IMesH2)(CH‐2‐(2‐PrO)C6H4)] (1 d), [RuCl2(IMesH2)(CH‐2,4,5‐(MeO)3C6H2)] (2 a), [Ru(CF3COO)2(IMesH2)(CH‐2,4,5‐(MeO)3C6H2)] (2 b), [Ru(CF3CF2COO)2(IMesH2)(CH‐ 2,4,5‐(MeO)3C6H2)] (2 c), [Ru(CF3CF2CF2COO)2(IMesH2)(CH‐2,4,5‐(MeO)3 C6H2)] (2 d), [RuCl2(IMes)(CH‐2‐(2‐PrO)C6H4)] (3 a), [Ru(CF3COO)2(IMes)(CH‐2‐(2‐PrO)C6H4)] (3 b), [RuCl2(IMesH2)(CH‐2‐(2‐PrO)‐5‐NO2C6H3)] (4 a), [Ru(CF3COO)2(IMesH2)(CH‐2‐(2‐PrO)‐5‐NO2C6H3)] (4 b), [Ru(CF3CF2COO)2(IMesH2)(CH‐2‐(2‐PrO)‐5‐NO2C6H3)] (4 c), and [Ru(CF3CF2CF2COO)2(IMesH2)(CH‐2‐(2‐PrO)‐5‐NO2C6H3)] (4 d) (IMes=1,3‐dimesitylimidazol‐2‐ylidene; IMesH2=1,3‐dimesityl‐4,5‐dihydroimidazol‐2‐ylidene) were prepared. Living polymerization systems could be generated with DEDPM by careful tuning of the electronic nature and steric placement of the ligands. Although 1 a, 2 a, 3 a, 3 b, and 4 a were inactive in the cyclopolymerization of DEDPM, and initiators 1 b–d did not allow any control over molecular weight, initiators 2 b–d and 4 b–d offered access to class VI living polymerization systems. In particular, compounds 2 b and 4 d were superior. The livingness of the systems was demonstrated by linear plots of Mn versus the number of equivalents of monomer added (N). For initiators 2 b–d and 4 b–d, values for kp/ki were in the range of 3–7, while 1 b, 1 c, and 1 d showed a kp/ki ratio of >1000, 80, and 40, respectively. The use of non‐degassed solvents did not affect these measurements and underlined the high stability of these initiators. The effective conjugation length (Neff) was calculated from the UV/Vis absorption maximum (λmax). The final ruthenium content in the polymers was determined to be 3 ppm.
Partial Sn‐Atom Ordering in Sm3Ga0.80—2.48Sn4.20—2.52.
Authors: Tokaychuk Yaroslav O. , Filinchuk Yaroslav E. , Fedorchuk Anatoliy O. , Bodak Oksana I. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Direct Decomposition of NO on Cu‐Doped La(Ba)Mn(In)O3 Perovskite Oxide under Coexistence of O2, H2O, and SO2.
Authors: Ishihara Tatsumi , Anami Kazuhiro , Takiishi Keiko , Yamada Hiroshi , Nishiguchi Hiroyasu , Takita Yusaku 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of 4,5‐Dihydro‐3‐(1′‐naphthyl)‐2H‐pyrazolino[3,4‐a]carbazoles and 3‐(1′‐Naphthyl)isooxazolo[3,4‐a]carbazoles.
Authors: Vandana T. , Prasad K. J. Rajendra 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of 2H‐1,2,3‐triazolo[4,5‐d]pyrimidine‐5,7‐diones from Uracils Using Cyclization Reaction of β‐Azo‐α,β‐unsaturated Sulfilimines.
Authors: Matsumoto Nobuaki , Takahashi Masahiko 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Structure of Ca18Li5In25.07: A Novel Intergrowth of Li‐Centered In12 Icosahedral Clusters and Electron‐Precise Zintl Layers.
Authors: Mao Jiang‐Gao , Goodey Joanna , Guloy Arnold M. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Two Mercury Chloro Thiocyanate Complexes: NH4[HgCl2(SCN)] and NH4[HgCl(SCN)2].
Authors: Gacemi Aissa , Benbertal Djamal , Bagieu‐Beucher Muriel , Lecchi Amelie , Mosset Alain 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Characterization of Mo6 Chalcobromides and Cyano‐Substituted Compounds Built from a Novel [(Mo6Br6iY2i) L6a]n‐ Discrete Cluster Unit (Yi: S or Se and La: Br or CN).
Authors: Cordier Stephane , Naumov Nikolai G. , Salloum Diala , Paul Frederic , Perrin Christiane 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Structure of the First Three‐Legged Low‐Dimensional Iron Phosphate, [H3N(CH2)3NH2 (CH2)2NH2 (CH2)3NH3] [Fe3F6(HPO4)2(PO4)] ×3H2O.
Authors: Mandal Sukhendu , Pati Swapan K. , Green Mark A. , Wang Sue‐Lein , Natarajan Srinivasan 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Preparation, Crystal Structure, and Normal Coordinate Analysis of Linkage Isomeric Pentachloroiodoselenocyanatoosmates(IV). Crystal Structure of trans‐(PPh4)2[OsCl4I(NCSe)].
Authors: Dallmann K. , Rehbehn S. , Preetz W. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of β‐Amino and β‐Methoxy Ketones by Lewis Acid Promoted β‐Substitution Reactions of β,γ‐Unsaturated Ketones.
Authors: Lee Adam Shih‐Yuan , Wang Shu‐Huei , Chang Yu‐Ting , Chu Shu‐Fang 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
3‐Nitrocoumarins as Dienophiles in the Diels—Alder Reaction in Water. An Approach to the Synthesis of Nitrotetrahydrobenzo[c]chromenones and Dihydrodibenzo[b,d]furans.
Authors: Amantini David , Fringuelli Francesco , Piermatti Oriana , Pizzo Ferdinando , Vaccaro Luigi 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Cyclization Radical Carbonylations of Azaenynes by TTMSS and Hexanethiol Leading to α‐Silyl‐ and Thiomethylene Lactams. Insights into the E/Z Stereoselectivities.
Authors: Tojino Mami , Otsuka Noboru , Fukuyama Takahide , Matsubara Hiroshi , Schiesser Carl H. , Kuriyama Hiroki , Miyazato Hironari , Minakata Satoshi , Komatsu Mitsuo , Ryu Ilhyong 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Fluoride‐Promoted Rearrangement of Organo Silicon Compounds: A New Synthesis of 2‐(Arylmethyl)aldehydes from 1‐Alkynes.
Authors: Aronica Laura Antonella , Raffa Patrizio , Caporusso Anna Maria , Salvadori Piero 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Control of Diastereoselectivity in the Crotylation and Cinnamylation of Aldehydes by the Selection of Ligands on Allylic Indium Reagents.
Authors: Hirashita Tsunehisa , Kamei Toshiya , Satake Makoto , Horie Tomoaki , Shimizu Hidetaka , Araki Shuki 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Secondary Benzylation Using Benzyl Alcohols Catalyzed by Lanthanoid, Scandium, and Hafnium Triflate.
Authors: Noji Masahiro , Ohno Tomoko , Fuji Koji , Futaba Noriko , Tajima Hiroyuki , Ishii Keitaro 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Selective Deprotection of tert‐Butyldimethylsilyl Ethers Using Nafion‐H®/Sodium Iodide (or Bromodimethylsulfonium Bromide) in Methanol.
Authors: Rani Shikha , Babu J. Lokesh , Vankar Yashwant D. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
An Efficient and Convenient Procedure for Preparation of N‐Sulfonylimines Catalyzed by TiO2/SO42‐ Solid Superacid.
Authors: Jin Tong‐Shou , Feng Guo‐Liang , Yang Mi‐Na , Li Tong‐Shuang 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Cyclization of α‐Oxo‐oximes to 2‐Substituted Benzoxazoles.
Authors: Katritzky Alan R. , Wang Zuoquan , Hall C. Dennis , Akhmedov Novruz G. , Shestopalov Aleksandr A. , Steel Peter J. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Unexpected 1,2,3‐Triazole Formation in the Reaction of Diethylaluminum Azide with α′‐Amino‐α,β‐Unsaturated Ketones.
Authors: Adamo Ilaria , Benedetti Fabio , Berti Federico , Nardin Giorgio , Norbedo Stefano 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Biological Activity of Arylamino‐Substituted Nitrobenzodifurazans.
Authors: Levinson F. S. , Evgen'ev M. I. , Ermolaeva E. A. , Efimov S. I. , Garipov T. V. , Karimova R. G. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
3‐Iodo‐4‐phenoxypyridinones (IOPY′s), a New Family of Highly Potent Non‐Nucleoside Inhibitors of HIV‐1 Reverse Transcriptase.
Authors: Benjahad Abdellah , Guillemont Jerome , Andries Koen , Nguyen Chi Hung , Grierson David S. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
4‐Methyl‐1,2,4‐triazol‐3‐yl Heterocycle as an Alternative to the 1‐Methylimidazol‐5‐yl Moiety in the Farnesyltransferase Inhibitor ZARNESTRA.
Authors: Angibaud Patrick , et al. et al. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Novel 3,4‐Dihydroquinolin‐2(1H)‐one Inhibitors of Human Glycogen Phosphorylase a.
Authors: Rosauer Keith G. , Ogawa Anthony K. , Willoughby Chris A. , Ellsworth Kenneth P. , Geissler Wayne M. , Myers Robert W. , Deng Qiaolin , Chapman Kevin T. , Harris Georgianna , Moller David E. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Combinatorial Approach of the Reactivity of 6‐ and 7‐Arylthieno[3,2‐d][1,3]oxazine‐2,4‐diones.
Authors: Le Foulon Francois‐Xavier , Braud Emmanuelle , Fabis Frederic , Lancelot Jena‐Charles , Rault Sylvain 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Functionalized Alkyl and Aryl Diselenides as Antimicrobial and Antiviral Agents: Synthesis and Properties.
Authors: Wojtowicz H. , Chojnacka M. , Mlochowski J. , Palus J. , Syper L. , Hudecova D. , Uher M. , Piasecki E. , Rybka M. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
From α‐1,2‐Anhydrosugars to C‐Glycosides: The Influence of Lewis Acids and Nucleophiles on the Stereochemistry.
Authors: Leeuwenburgh Michiel A. , van der Marel Gijsbert A. , Overkleeft Herman S. , van Boom Jacques H. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of Methyl 3‐Deoxy‐α/β‐D‐ribofuranoside by Regioselective Reductive Opening of Methyl 2,3‐Anhydro‐α/β‐D‐ribofuranoside.
Authors: Mereyala Hari Babu , Bantu Rajashekar 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Potent anti‐Metastatic Activity of Dimeric Sesquiterpene Thioalkaloids from the Rhizome of Nuphar pumilum.
Authors: Matsuda Hisashi , Morikawa Toshio , Oda Mamiko , Asao Yasunobu , Yoshikawa Masayuki 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Pseudoalterobactin A and B, New Siderophores Excreted by Marine Bacterium Pseudoalteromonas sp. KP20‐4.
Authors: Kanoh Kaneo , Kamino Kei , Leleo Guan , Adachi Kyoko , Shizuri Yoshikazu 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
The Effects of Indomethacin Spray on the Pain of Stomatitis in the Patients for Hematopoietic Stem Cell Transplantation
Authors: Nakamura Takako , Aoyama Takao , Yanagihara Yoshitsugu , Yamada Yasuhiko , Miyoshi Akemi , Kanda Yoshinobu , Hirai Hisamaru , Furukawa Toshirou , Iga Tatsuji 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Temperature‐Controlled Hydrothermal Synthesis of a 2D Ferromagnetic Coordination Bilayered Polymer and a Novel 3D Network with Inorganic Co3(OH)2 Ferrimagnetic Chains.
Authors: Tong Ming‐Liang , Kitagawa Susumu , Chang Ho‐Chol , Ohba Masaaki 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Intramolecular Cycloadditions of Cyclobutadiene with Dienes: Experimental and Computational Studies of the Competing [2 + 2] and [4 + 2] Modes of Reaction.
Authors: Limanto John , Khuong Kelli S. , Houk K. N. , Snapper Marc L. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Reactivity of α‐Bromo‐4‐(difluoromethylthio)acetophenone.
Authors: Demchenko A. M. , Nazarenko K. G. , Andrushko A. P. , Fediyuk D. V. , Krasovsky A. N. , Yagupolsky L. M. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Borrowing Hydrogen: A Catalytic Route to C—C Bond Formation from Alcohols.
Authors: Edwards Michael G. , Jazzar Rodolphe F. R. , Paine Belinda M. , Shermer Duncan J. , Whittlesey Michael K. , Williams Jonathan M. J. , Edney Dean D. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Dichloro(dodeca‐2,6,10‐triene‐1,12‐diyl)ruthenium(IV): A Highly Efficient Catalyst for the Isomerization of Allylic Alcohols into Carbonyl Compounds in Organic and Aqueous Media.
Authors: Cadierno Victorio , Garcia‐Garrido Sergio E. , Gimeno Jose 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Further Utilization of Mucohalic Acids: Palladium‐Free, Regioselective Etherification and Amination of α,β‐Dihalo γ‐Methoxycarbonyloxy and γ‐Acetoxy Butenolides.
Authors: Blazecka Peter G. , Belmont Daniel , Curran Tim , Pflum Derek , Zhang Ji 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Alkoxyamine‐Mediated Radical Synthesis of Indolinones and Indolines.
Authors: Leroi Corinne , Bertin Denis , Dufils Pierre‐Emmanuel , Gigmes Didier , Marque Sylvain , Tordo Paul , Couturier Jean‐Luc , Guerret Olivier , Ciufolini Marco A. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
A New Convenient Method for Synthesis of 3‐(2‐Oxoethylidene)isoindolin‐1‐ones Employing Palladium(II) Acetate and DDQ.
Authors: Ueki Akiharu , Tanaka Satoru , Kumazawa Masunori , Ooi Takashi , Sano Shigeki , Nagao Yoshimitsu 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
1‐Oxa‐3‐azapentalen‐2‐ones as Precursors of cis‐2‐Amino Alcohols: Synthesis from Propargyl Alcohols, Co2, and Amines Using an Intramolecular Amidoalkylation Reaction of Oxazolidin‐2‐ones.
Authors: Chernysheva N. B. , Bogolyubov A. A. , Nesterov V. V. , Antipin M. Yu. , Semenov V. V. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Reactions of Nitroarenes with Secondary and Tertiary Carbanions Bearing Both a Leaving Group and Electron‐Withdrawing Group: An Approach to Dihydronaphth[2,1‐c]isoxazole N‐Oxides and Dihydroisoxazolo[4,3‐f]quinoline N‐Oxides.
Authors: Maruoka Hiroshi , Tomioka Yukihiko 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
The Formation of 1,2,4‐Triazolylimidazolidine‐2,4‐diones in Reactions of 3‐Aryl‐1,2,4‐triazin‐5(2H)‐ones with Alkylureas.
Authors: Beresnev D. G. , Rusinov G. L. , Ponomareva A. Yu. , Chupakhin O. N. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
New Cyclizing Reagent for the Synthesis of 1,3,4‐Thiadiazoles
Authors: Yarovenko Vladimir N. , Shirokov Aleksandr V. , Zavarzin Igor V. , Krupinova Oksana N. , Ignatenko Anatolii V. , Krayushkin Mikhail M. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Inhibition of Angiogenesis by THAM‐Derived Cotelomers Endowed with Thalidomide Moieties.
Authors: Perino Sandrine , Contino‐Pepin Christiane , Satchi‐Fainaro Ronit , Butterfield Catherine , Pucci Bernard 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Transformation of 1,2,5,6‐Tetrahydropyridines with Mycellar Fungi.
Authors: Terentiev P. B. , Zilberstein T. M. , Borisenko A. A. , Shmorgunov V. A. , Piskunkova N. F. , Grishina G. V. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
N‐3‐Oxoalkylamides and ‐thioamides in the Synthesis of Heterocyclic Compounds. Part 7. Study of the Cyclization of N‐(3‐Oxoalkyl)amides of Tosylacetic Acid.
Authors: Fisyuk A. S. , Poendaev N. V. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Facile Synthesis of 4a‐Fluoro‐5,10‐ethenobenzo[f]quinazolines Through 1,4‐Photocycloaddition of 5‐Fluoro‐1,3‐dimethyluracil with Substituted Naphthalenes.
Authors: Ohkura Kazue , Sugaoi Tatsuyuki , Ishihara Tetsuya , Aizawa Kazuya , Nishijima Ken‐ichi , Kuge Yuji , Seki Koh‐ichi 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Cyclocondensation of 2‐Aminobenzimidazole with Dimedone and Its Arylidene Derivatives.
Authors: Lipson V. V. , Desenko S. M. , Shishkina S. V. , Shirobokova M. G. , Shishkin O. V. , Orlov V. D. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of 2‐Aryl‐2,3‐dihydro‐4H‐[1,3]thiazino[3,2‐a]benzimidazol‐4‐ones and 7‐Aryl‐2,3,6,7‐tetrahydro‐5H‐imidazo[2,1‐b]‐1,3‐thiazin‐5‐ones
Authors: Britsun V. N. , Lozinskii M. O. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis, Structures, and Properties of Bis(4,6‐Disubstituted 1,3,5‐triazin‐2‐yl) Ethers.
Authors: Mikhailichenko S. N. , Chesnyuk A. A. , Konyushkin L. D. , Zaplishnyi V. N. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Facile Conversion of Amides and Lactams to Selenoamides and Selenolactams Using Tetraethylammonium Tetraselenotungstate.
Authors: Saravanan Vadivelu , Mukherjee Chandan , Das Saibal , Chandrasekaran Srinivasan 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of A‐Ring Synthon of 2α‐Substituted Vitamin D3 Analogues Utilizing Grignard Reaction Towards Methyl 2,3‐Anhydro‐4,6‐O‐benzylidene‐α‐D‐mannopyranoside.
Authors: Honzawa Shinobu , Yamamoto Yasuhiro , Hirasaka Koshiro , Takayama Hiroaki , Kittaka Atsushi 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Oximidine III, a New Antitumor Antibiotic Against Transformed Cells from Pseudomonas sp. Part 1. Taxonomy, Fermentation, Isolation, Physico‐chemical Properties and Biological Activity.
Authors: Hayakawa Yoichi , Tomikawa Taijiro , Shin‐Ya Kazuo , Arao Nakako , Nagai Koji , Suzuki Ken‐ichi 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Acetylene‐Based Analogues of Thiolactomycin, Active Against Mycobacterium tuberculosis mtFabH Fatty Acid Condensing Enzyme.
Authors: Senior Suzanne J. , Illarionov Petr A. , Gurcha Sudagar S. , Campbell Ian B. , Schaeffer Merrill L. , Minnikin David E. , Besra Gurdyal S. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
(R)‐4‐Menthenone in the Synthesis of Optically Pure Sex Pheromone of the Peach Leafminer Moth (Lyonetia clerkella).
Authors: Kharisov R. Ya. , Latypova E. R. , Talipov R. F. , Muslukhov R. R. , Ishmuratov G. Yu. , Tolstikov G. A. 
Published: April 2004

AbstractFor Abstract see ChemInform Abstract in Full Text.
Bis(fluoromesityl) Palladium Complexes, Archetypes of Steric Crowding and Axial Protection by ortho Effect − Evidence for Dissociative Substitution Processes − Observation of 19F−19F Through‐Space Couplings
Authors: Bartolomé Camino , Espinet Pablo , Martín‐Álvarez Jose M. , Villafañe Fernando 
Published: April 2004

AbstractBisarylated complexes trans‐[Pd(Fmes)2(SR2)2] [Fmes = 2,4,6‐tris(trifluoromethyl)phenyl (fluoromesityl); SR2 = SMe2, tht; tht = tetrahydrothiophene] are precursors for various bisarylated fluoromesityl palladium(II) complexes by ligand‐substitution reactions. Boiling under reflux in acetonitrile gives the mixed complexes trans‐[Pd(Fmes)2(NCMe)(SR2)], whereas boiling under reflux in toluene leads to trans‐[PdCl2L2] (L = PMe3, tBuNC, pTol‐NC, 4‐MePy), in the presence of neutral monodentate ligands, or to (NnBu4)[trans‐Pd(Fmes)2I(SR2)] when treated with (NnBu4)I. trans‐[Pd(Fmes)2(SMe2)2] reacts with bidentate ligands, also boiling under reflux in toluene, to give [Pd(Fmes)2(L−L)] [L−L = Me2bipy, 2,2′‐biquinolyl, κ2N,N′‐OCPy2, dppm (Ph2PCH2PPh2), dppe (Ph2PCH2CH2PPh2), pte (PhSCH2CH2SPh), κ2S,N‐SPPh2Py, κ2O,N‐OPPhPy2], or the bimetallic complex [Pd(Fmes)2(μ‐1κN:1,2κO:2κN‐Py2MeCO)Pd(Fmes)(SMe2)] (characterized by X‐ray diffractometry) when treated with (OH)(CH3)CPy2. The crowding associated with two Fmes groups produces several interesting features: (1) trans complexes are preferred over cis complexes, against the expected electronic preferences; (2) the low‐temperature NMR spectra of several complexes, or the X‐ray diffraction structure of [Pd(Fmes)2(2,2′‐biquinolyl)], reveal significant structural distortions associated with steric crowding; (3) the need for boiling under reflux in the synthesis suggests a dissociative substitution mechanism, which is unknown so far for Pd; (4) some of the complexes show 19F−19F through‐space couplings. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
Ferromagnetic and Antiferromagnetic Polymeric Complexes with the Macrocyclic Ligand 1,4,7‐Triazacyclononane
Authors: Cheng Peng , Yan Shi‐Ping , Xie Cheng‐Zhi , Zhao Bin , Chen Xiao‐Yan , Liu Xuan‐Wen , Li Chun‐Hui , Liao Dai‐Zheng , Jiang Zong‐Hui , Wang Geng‐Lin 
Published: April 2004

AbstractThree novel copper polymers, {[Cu4(tacn)4(o‐bda)2](ClO4)4(H2O)2}n (1), {[Cu(tacn)(m‐bda)](CH3OH)0.5(H2O)0.5}n (2), and {[Cu2(tacn)2(p‐bda)](ClO4) 2}n (3) (tacn = 1,4,7‐triazacyclononane, bda = benzenedicarboxylic acid) have been synthesized and structurally characterized. Compound 1 belongs to the monoclinic space group C2, while 2 and 3 crystallize in the orthorhombic space group Pmc2(1) and the monoclinic space group P21/n, respectively. They are all 1D zigzag polymers, which can be considered as Cu(tacn)2+ building units linked by isomers of benzenedicarboxylic acid. The variable‐temperature (2−300 K) magnetic behavior revealed the existence of ferromagnetic interactions in 1 and 2. The best fittings of the experimental magnetic susceptibilities gave J = 4.0 cm−1 and g = 2.04 for 1, J = 1.2 cm−1, zJ′ = −0.18 cm−1 and g = 2.07 for 2, whereas the exchange coupling between CuII ions in 3 is antiferromagnetic with J = −13.1 cm−1 and g = 2.05. The transformation of interactions between copper ions from ferromagnetic to antiferromagnetic is closely related to the variations in the isomeric benzenedicarboxylic acids. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
Synthesis and Structure of New (Polyphosphane)ruthenium Complexes with the Hemilabile Ligand 2‐(Diphenylphosphanyl)‐1‐methyl‐1H‐imidazole − An Unexpected Rearrangement of [RuCl2(PN)(PPh3)2]
Authors: Espino Gustavo , Jalón Félix A. , Maestro Miguel , Manzano Blanca R. , Pérez‐Manrique Mercedes , Bacigalupe Ana C. 
Published: April 2004

AbstractSeveral RuII complexes containing the potentially bidentate ligand 2‐(diphenylphosphanyl)‐1‐methyl‐1H‐imidazole [PPh2MeIm (PN)] have been synthesised and characterised. Reaction of the ligand with [RuCl2(PPh3)3] in different molar ratios led to the formation of the complexes trans,mer‐[RuCl2(PPh3)2(κ2‐P,N−PPh2MeIm)] (1), fac‐[RuCl(PPh3)(κ2‐P,N‐PPh2MeIm)2]Cl (2a), mer‐[RuCl(PPh3)(κ2‐P,N‐PPh2MeIm)2]Cl (2b), fac‐[RuCl(κ1‐P‐PPh2MeIm)(κ2‐P,N‐PPh2MeIm)2]Cl (3a), and mer‐[RuCl(κ1‐P‐PPh2MeIm)(κ2‐PN‐PPh2MeIm)2]Cl (3b). Complex 1 evolves in solution to 2a, 2b and the dinuclear species [(PPh3)(κ1‐P‐PPh2MeIm)ClRu(μ‐Cl)2Ru(PPh3)(κ1‐P‐PPh2MeIm)Cl] (4a), [(PPh3)ClRu(μ‐Cl)2(μ2‐P,N‐PPh2MeIm)2Ru(PPh3)Cl] (4b), and [(PPh3)(κ2‐P,N‐PPh2MeIm)ClRu(μ‐Cl)2Ru(PPh3)(κ2‐P,N‐PPh2MeIm)Cl] (4c). It is proposed that the formation of the dinuclear derivatives involves an Ru−N bond‐breaking step that demonstrates the hemilabile behaviour of the ligand. When 2 equiv. of the PN ligand were added to [RuCl2(cod)(bpzm)] [cod = 1,5‐cyclooctadiene, bpzm = bis(pyrazol‐1‐yl)methane], the complex cis‐P‐[RuCl2(κ1‐PPh2MeIm)(κ2‐PPh2MeIm)] (5) was formed as the only product. The derivatives [Ru(κ2‐PPh2MeIm)3]X2 [(X = PF6 (6), BF4 (7)] were obtained upon treatment of [RuCl2(arene)]2 (arene = p‐cymene, benzene) with 2 equiv. of the corresponding silver salts and the PN ligand. Both the fac (6a, 7a) and mer (6b, 7b) forms were obtained. Two new hydride complexes were also synthesised: mer‐[RuHClL2(κ2‐PPh2MeIm)] [L = PPh3 (8) or κ1‐PN (9)] by reaction of the PN ligand with [RuHCl(PPh3)3] or [RuHCl(cod)(bpzm)], respectively. The molecular structure of 4b and fac‐7a was solved by an X‐ray diffraction study. Complex 4b has a dinuclear structure with two chloride bridges and two head‐to‐tail PN bridges. The derivative fac‐7a is mononuclear. Both enantiomers — Δ and Λ — were observed in the same unit cell. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)