نتایج جستجو برای: dissymmetric dinuclear complexes

تعداد نتایج: 138514  

Journal: :Dalton transactions 2007
Giuseppe La Spina Rodolphe Clérac Emily S Collins Thomas McCabe Munuswamy Venkatesan Izumi Ichinose Wolfgang Schmitt

Hybrid organic-inorganic coordination assemblies are synthesized using modified aminocarboxylic acid ligands as the structure-directing agents. The synthetic approach results in two novel dinuclear copper(II) complexes, K2[CuII(hnida)]2.2H2O (1) and K4[CuII(chnida)]2.4H2O.4MeOH (2) that assemble in the presence of suitable counterions into a densely packed hexagonal array or an open-framework s...

Journal: :Crystals 2022

The new ligand HMeATSM, derived from condensation of 2-3-butanedione with 4-methyl-3-thiosemicarbazide and 2,4-dimethyl-3-thiosemicarbazide, has been synthesized. Its reactivity nickel(II) zinc(II) nitrates was explored the resulting complexes were thoroughly characterized by elemental analysis, conductivity, mass spectrometry, IR, 1H 13C NMR spectroscopies their structures confirmed single-cry...

Journal: :Metal-Based Drugs 1999
Janet B. Foley Stanley E. Gay Christopher Turmel Gang Wei Tong Jiang Ratnavathany Narayanaswamy Bruce M. Foxman Michael J. Vela Alice E. Bruce Mitchell R. M. Bruce

Cyclic voltammetry (CV) experiments on LL(AuSR *)(2) complexes [LL = diphenylphosphinomethane (dppm), diphenylphosphinopentane (dpppn); R(*) = p-SC(6)H(4)CH(3)] show anodic sweeps that broaden by about 25 mV on going from the longer (dpppn) to the shorter (dppm) bidentate phosphine ligand. Changing concentrations had no effect on the shape of the waveform. The result suggests a weak intramolecu...

2007
Inke Siewert Christian Limberg

The syntheses of two functionalized xanthenes are described which after deprotonation represent ligands for dinuclear metal complexes. For the previously prepared [Xanthdim]H2 – which after deprotonation leads to a ligand with two adjacent β -diiminato binding sites – a significantly improved synthetic procedure is described involving the Pd catalyzed coupling of two diethyl malonate moieties t...

Journal: :Dalton transactions 2014
Wen-Bin Chen Zhi-Xin Li Xin-Wei Yu Meng Yang Yan-Xuan Qiu Wen Dong Ya-Qiu Sun

Two hydrated 5-azotetrazolyl salicylic acid (H3ASA) of [(H3ASA)·H2O] (1) and [(H3ASA)·4H2O] (2) and five H3ASA based dinuclear Ln(3+) complexes of {[Ln2(H1.5ASA)4(H2O)8]·6H2O} [Ln = Dy (3), Tb(4)], {[Gd2(H1.5ASA)4 (H2O)8]·5H2O} (5), {[Sm2(H1.5ASA)4(H2O)8]·6H2O} (6) and {[Eu4(H1.5ASA)8(H2O)18]·10H2O} (7) have been synthesized and characterized by single crystal X-ray diffraction analysis. In 1 a...

Journal: :Dalton transactions 2010
Nicolas P E Barry Fabio Edafe Paul J Dyson Bruno Therrien

A series of cationic metalla-rectangles of the general formula [(p-cymene)(4)Os(4)(OO[intersection]OO)(2)(N[intersection]N)(2)](4+) have been obtained in methanol from the dinuclear arene osmium precursors [(p-cymene)(2)Os(2)(OO[intersection]OO)(2)Cl(2)] (OO[intersection]OO = 2,5-dioxydo-1,4-benzoquinonato (dhbq), 2,5-dichloro-1,4-benzoquinonato (dcbq)) by reaction with bipyridine linkers (N[in...

Journal: :Angewandte Chemie 2014
Isidoro López Mehmed Z Ertem Somnath Maji Jordi Benet-Buchholz Anke Keidel Uwe Kuhlmann Peter Hildebrandt Christopher J Cramer Victor S Batista Antoni Llobet

The homogeneous catalysis of water oxidation by transition-metal complexes has experienced spectacular development over the last five years. Practical energy-conversion schemes, however, require robust catalysts with large turnover frequencies. Herein we introduce a new oxidatively rugged and powerful dinuclear water-oxidation catalyst that is generated by self-assembly from a mononuclear catal...

Journal: :Dalton transactions 2009
Christian Radloff F Ekkehardt Hahn Tania Pape Roland Fröhlich

A series of benzobisimidazolium salts 1a-d has been prepared by tetraalkylation of benzobisimidazol. The salts 1a-d react with two equivalents of [Pt(Cl)2dppe] in the presence of 2.2 equivalents of sodium acetate to yield the dinuclear biscarbene complexes 2a-d. Under the same reaction conditions, the benzobisimidazolium salts react with only one equivalent of [Pt(Cl)2dppe] and one equivalent o...

Journal: :Research on Chemical Intermediates 2021

The structures of three dinuclear zinc-amido complexes, involved in the very first step preparation zinc oxide nanoparticles via an organometallic route, have been investigated by density functional theory computational studies. various zinc–nitrogen and zinc–cyclohexyl bonds are finely characterized using quantum atoms molecules electron localization function (ELF) topological analyses. result...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید