Binuclear chromium carbonyl complexes of methylaminobis(difluorophosphine): metal–metal bonds versus four-electron donor bridging carbonyl groups

2017 ◽  
Vol 41 (7) ◽  
pp. 2625-2635 ◽  
Author(s):  
Huijuan Miao ◽  
Xiuhui Zhang ◽  
Yang Bai ◽  
Qian-shu Li ◽  
R. Bruce King
Keyword(s):  
Electron Donor ◽  
Low Energy ◽  
Carbonyl Groups ◽  
Carbonyl Complexes ◽  
Metal Metal ◽  
Chromium Carbonyl ◽  
Chromium Carbonyl Complexes ◽  
Metal Metal Bonds ◽  
Metal Bonds

[MeN(PF2)2]mCr2(CO)n (m = 1, n = 10, 9, 8; m = 2, n = 8, 7, 6; m = 3, n = 6, 5, 4) have been studied theoretically. Low-energy structures with four-electron donor groups and split ligands are found.

Redox-Chemie einfach arsenverbriickter Zweikernkomplexe ohne Metall-Metall-Bindung /Redox Chemistry of Singly Arsenic Bridged Dinuclear Complexes without Metal-Metal Bonds

1979 ◽  
Vol 34 (9) ◽  
pp. 1195-1198 ◽  
Author(s):  
Thomas Madach ◽  
Heinrich Vahrenkamp
Keyword(s):  
Metal Carbonyl ◽  
Chemical Oxidation ◽  
Redox Process ◽  
Dinuclear Complexes ◽  
Carbonyl Complexes ◽  
Metal Carbonyl Complexes ◽  
Metal Metal ◽  
Metal Metal Bonds ◽  
Electron Transfers ◽  
Metal Bonds

The oxidations and reductions of 27 singly arsenic bridged dinuclear metal carbonyl complexes were investigated. There are indications that the complexes as a whole are involved in the redox process. However, the expected one and two electron oxidations with concomitant formation of metal-metal bonds were not observed. Electrochemical electron transfers were irreversible. Chemical oxidation and reduction of a selected example resulted in a series of products originating from the primary fission of one metal-arsenic bond.

Paramagnetic organometallic molecules. XV. Electron attachment reactions of metal carbonyls

1983 ◽  
Vol 36 (3) ◽  
pp. 613 ◽  
Author(s):  
AS Huffadine ◽  
BM Peake ◽  
BH Robinson ◽  
J Simpson
Keyword(s):  
Metal Carbonyl ◽  
Electron Attachment ◽  
Metal Carbonyls ◽  
Carbonyl Complexes ◽  
Metal Carbonyl Complexes ◽  
Metal Metal ◽  
Organometallic Molecules ◽  
Metal Metal Bonds ◽  
Metal Bonds

A number of polynuclear metal carbonyl complexes can be used as substrates for electron attachment reactions induced by the photoionization of N,N,N',N'-tetramethyl-p-phenylenediamine. Theproducts of such reactions are derived from metal carbonyl radicals produced by cleavage of the metal-metal bonds.

Elektrochemische und elektronenspektroskopische Messungen zur Natur einfach arsenverbriickter Metall-Metall-Bindungen/Electrochemical and Electron Spectroscopic Measurements on the Nature of Singly Arsenic Bridged Metal-Metal Bonds

1979 ◽  
Vol 34 (9) ◽  
pp. 1190-1194 ◽  
Author(s):  
Ute Honrath ◽  
Heimich Vahrenkamp
Keyword(s):  
Metal Carbonyl ◽  
Atomic Weight ◽  
Relative Strength ◽  
Phosphine Ligands ◽  
Redox Potentials ◽  
Carbonyl Complexes ◽  
Reduction Potentials ◽  
Metal Metal ◽  
Metal Metal Bonds ◽  
Metal Bonds

For a series of singly arsenic bridged dinuclear metal carbonyl complexes with metal-metal bonds electronic spectra and dc-voltammograms in 1,2-dichloroethane were recorded. There is a reasonable correlation between the σ→σ* transitions and the first reduction potentials which can both be taken as measures of the relative strength of the metal-metal bonds. The σ→σ* excitation energy and the negative reduction potential increase (a) with increasing atomic weight of the connected metal atoms, (b) with in­creasing number of CO groups present, (c) with decreasing intramolecular steric hindrance. Steric and electronic factors cannot be cleanly separated. There seems to be no correlation with metal-metal bond lengths. Terminal phosphine ligands decrease all redox potentials but hardly change the electronic absorptions.

Compounds with Unbridged Dative Metal−Metal Bonds of Formula (R3P)2(OC)3OsW(CO)5and Related Complexes

2000 ◽  
Vol 19 (24) ◽  
pp. 5049-5062 ◽  
Author(s):  
Faming Jiang ◽  
Hilary A. Jenkins ◽  
Kumar Biradha ◽  
Harry B. Davis ◽  
Roland K. Pomeroy ◽  
...  
Keyword(s):  
Metal Metal ◽  
Metal Metal Bonds ◽  
Metal Bonds
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