Gold(III) Complexes of Pyridyl- and Isoquinolylamido Ligands: Structural, Spectroscopic, and Biological Studies of a New Class of Dual Topoisomerase I and II Inhibitors
作者:Colin R. Wilson、Alexander M. Fagenson、Wanvipa Ruangpradit、Mark T. Muller、Orde Q. Munro
DOI:10.1021/ic400339z
日期:2013.7.15
5% of the X-ray values), while accurate transition energies were limited to those calculated in the UV spectral region. The complexes had variable stability in dimethyl sulfoxide: compound 3 (relatively rigid) was indefinitely stable, compounds 1 and 2 (conformationally flexible) slowly demetalated over 30 days, and 4 (extensively aromatic) formed an insoluble precipitate after 10 days (72 h in an aqueous
Spectroscopic characterization of coaxially and π—π stacked binuclear copper(II) complexes of ω,ω′-bis(pyridine-2-carboxamido)alkanes in acidic solution
作者:Yuji Kajikawa、Nagao Azuma、Kunihiko Tajima
DOI:10.1016/s0020-1693(98)00315-6
日期:1998.12
Although H2ppda gave crystals of a binuclear complex with many lattice water molecules, H2peda and H2pbda ligands provided crystals of copper(II) polymer complexesfrom the respective acidic solution. The trans-H2pcyhda ligand forms a copper(II) binuclear complex with open-chain structure in acidic solution. Crystal structures of the polymer complexes are also presented.
A Tetragonal Core with Asymmetric Iron Environments Supported Solely by Bis(μ‐OH){μ‐(O–H···O)} Bridging and Terminal Pyridine Amide (N, O) Coordination: A New Member of the Tetrairon(III) Family
作者:Akhilesh K. Singh、Wilson Jacob、Athanassios K. Boudalis、Jean‐Pierre Tuchagues、Rabindranath Mukherjee
DOI:10.1002/ejic.200800032
日期:2008.6
o)propane (H2bpp) yields the tetrairon(III) complex [Fe4(H2bpp)4(μ-OH)2(μ-OHO)][ClO4]7·2H2O·xMeCN (1·xMeCN, 0 ≤ x ≤ 3). Crystalstructure determination reveals that 1·3MeCN is a new member of the tetrairon(III) family, bridged solely by two hydroxido ligands and a localized O–H···O}3– bridging unit. The properties of the “tetragonal” core [Fe4(μ-OH)2μ-(O–H···O)}]7+ have been investigated by variable-temperature
Chemistry of gold(III) with pyridine-carboxamide ligands
作者:Nasser Nasser、Richard J. Puddephatt
DOI:10.1016/j.poly.2013.11.022
日期:2014.2
The pyridine-carboxamide ligand PhNHC(=O)-2-C5H4N reacts with Na+[AuCl4](-) either by cation exchange, to give [PhNHC(=O)-2-C5H4NH][AuCl4], or by ligand substitution to give [AuCl2(kappa(2)-N,N'-PhNC(=O)-2-C5H4N)]. Similar reactions with bis(pyridine-carboxamide) ligands gave complexes [AuCl2(kappa(2)-N,N'-RNC(=O)-2-C5H4N)], with R = (CH2)(3)NHC(=O)-2-C5H4N or 2-C6H4NHC (=O)-2-C5H4N, in which the ligands are bidentate, but no complexes with tetradentate ligands could be isolated. The complex [AuCl2(kappa(2)-N,N'-PhNC(=O)-2-C5H4N)] in methanol solution is an efficient catalyst for oxidative cyanation of PhNMe2 to give PhMeNCH2CN, and it is proposed that the catalysis involves gold(I), gold(II) and gold(III) intermediates. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis and characterization of [Ru(NO)(bpp)Cl·2H2O] [bpp=N,N′-bis(2-pyridinecarboxamide)-1,3-propane dianion] and [Ru(NO)(bpe)Cl·2H2O] [bpe=N,N′-bis(2-pyridinecarboxamide)-1,2-ethane dianion]
作者:Carol F. Fortney、Steven J. Geib、Fu-tyan Lin、Rex E. Shepherd
DOI:10.1016/j.ica.2004.09.060
日期:2005.6
Two ruthenium nitrosyl bis-pyridyl/biscarboxamido compounds, [Ru(NO)(bpp)Cl center dot 2H(2)O] [bpp = N,N'-bis(2-pyridinecarboxamide)-1,3-propane dianion] and [Ru(NO)(bpe)Cl center dot 2H(2)O] [bpe = NN-(bis-2-pyridinecarboxamide)-1,2-ethane dianion] have been characterized by H-1 NMR, C-13H-1} NMR, and IR spectroscopies, electrospray ionizaton mass spectrometry, and X-ray crystallography. (c) 2004 Elsevier B.V. All rights reserved.