Metal-Metal interactions in indium(I) and thallium(I) cyclopentadienyls

ABSTRACTStudies of the mixed-metal interface in metal impregnated alumina have indicated the possibility of much metal-metal and metal-substrate interaction. Studies were carried out on NiCu/Al2O3 system which was evaluated to develop a better understanding of the forces that drive modification of the catalytic selectivity of Ni in the presence of Cu. Electron Paramagnetic Resonance (EPR), Powder X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD) and theoretical calculations were carried out on this bimetallic system, using Ni,Ag/Al2O3 as a reference as Ni shows negligible electron perturbation on co-adsorbance with Ag onto alumina. XRD results indicate that gross modification of the electronic fields of Ni and Cu are due to direct coupling and intercalation into the alumina matrix. As a result of this phenomena, these materials may form a good base for the development of novel ceramics based on mixed-metal interactions where the intermetallic perturbations are driven by the substrate effects.

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The metal — metal interactions in biological systems. Part I. Escherichlia coli

Water Air & Soil Pollution ◽

10.1007/bf00229442 ◽

1990 ◽

Vol 52 (3-4) ◽

pp. 337-357 ◽

Cited By ~ 9

Author(s):

Wiesław Barabasz ◽

Bogusława Hetmańska ◽

Piotr Tomasik

Keyword(s):

Biological Systems ◽

Metal Interactions ◽

Metal Metal

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Pyrazolyl-bridged iridium dimers. 2. Contrasting modes of two-center oxidative addition to a bimetallic system and reductive access to the starting complex: three key diiridium structures representing short nonbonding and long and short bonding metal-metal interactions

Journal of the American Chemical Society ◽

10.1021/ja00367a076 ◽

1982 ◽

Vol 104 (3) ◽

pp. 922-923 ◽

Cited By ~ 48

Author(s):

A. W. Coleman ◽

Donald T. Eadie ◽

Stephen R. Stobart ◽

Michael J. Zaworotko ◽

Jerry L. Atwood

Keyword(s):

Oxidative Addition ◽

Metal Interactions ◽

Metal Metal ◽

Bimetallic System

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Crystal and molecular structure and 31P and 195Pt nmr spectroscopy of [Pt3S2(PMe2Ph)6][BEt4]2; a trinuclear complex containing triply-bridging sulphide ligands

Canadian Journal of Chemistry ◽

10.1139/v84-116 ◽

1984 ◽

Vol 62 (4) ◽

pp. 696-702 ◽

Cited By ~ 19

Author(s):

Gordon William Bushnell ◽

Keith Roger Dixon ◽

Reiko Ono ◽

Alan Pidcock

Keyword(s):

Trinuclear Complex ◽

Complete Analysis ◽

Monoclinic Space Group ◽

X Ray Diffraction ◽

X Ray ◽

Metal Interactions ◽

Nuclear Magnetic Resonance Spectra ◽

Square Planar ◽

Metal Metal ◽

Pd Complexes

An X-ray diffraction study of [Pt3S2(PMe2Ph)6][BEt4]2 shows that it crystallises in the monoclinic space group, C2/c, with a = 15.447(2), b = 18.033(3), c = 26.505(5) Å, β = 96.73(2)°. The cation consists of three, distorted, square-planar cis-PtS2(PMe2Ph)2 moieties combined by sharing of the two sulphur atoms to produce a central Pt3S2 unit with C2 symmetry and Pt—Pt distances of 3.182(1) Å (one edge) and 3.108(1) Å (two edges). Complete analysis and computer simulation of 31P{1H} and 195Pt{1H} nuclear magnetic resonance spectra give values for 1J(Pt—P), 3202 Hz; 3J(Pt—P), −25 Hz; and 2J(Pt—Pt), 476 Hz. The structure is compared with previous results for analogous Ni and Pd complexes and the structural and nmr parameters are discussed with reference to the possibility of metal–metal interactions.

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