Electronic coupling between covalently linked metal-metal quadruple bonds of molybdenum and tungsten

1989 ◽  
Vol 111 (24) ◽  
pp. 8921-8923 ◽  
Author(s):  
Roger H. Cayton ◽  
Malcolm H. Chisholm
Keyword(s):  
Electronic Coupling ◽  
Metal Metal ◽  
Quadruple Bonds ◽  
Covalently Linked ◽  
And Tungsten

In search of metal-metal metathesis in the chemistry of compounds containing metal-to-metal triple bonds between molybdenum and tungsten atoms

1978 ◽  
Vol 17 (6) ◽  
pp. 1673-1675 ◽  
Author(s):  
M. H. Chisholm ◽  
M. W. Extine ◽  
R. L. Kelly ◽  
W. C. Mills ◽  
C. A. Murillo ◽  
...  
Keyword(s):  
Triple Bonds ◽  
Metal Metal ◽  
And Tungsten

Intervalence transfer in a new benzotriazolate bridged ruthenium-iron complex

2001 ◽  
Vol 79 (2) ◽  
pp. 145-156
Author(s):  
Reginaldo C Rocha ◽  
Henrique E Toma
Keyword(s):  
Near Infrared ◽  
Mixed Valence ◽  
Differential Pulse ◽  
Iron Complex ◽  
Electronic Coupling ◽  
Near Ir ◽  
Metal Metal ◽  
Dinuclear Ruthenium ◽  
Pulse Voltammetry ◽  
Transfer Properties

The unsymmetrical dinuclear ruthenium–iron complexes [(NH3)5Ru–bta–Fe(CN)5]n (where bta = benzotriazolate; n = –2, –1, 0) were prepared as solid sodium salts from [RuII(NH3)5(bta)]+ or [RuIII(NH3)5(bta)]2+ and [FeII(CN)5(H2O)]3– and characterized in aqueous solution by means of electrochemical and spectroelectrochemical methods. UV-vis, near-infrared, IR, and cyclic and differential pulse voltammetry data suggest that the related mixed valent species belong to a valence trapped formulation, featuring localized Ru(III) and Fe(II) oxidation states. In spite of the class II categorization in the Robin and Day scheme, this system shows a remarkable metal–metal electronic coupling, as deduced from an intense, low-energy, and very broad intervalence band in the near-IR region. In addition, the mixed valence state displays enhanced stabilization in relation to the isovalent state. The intervalence transfer properties are discussed on the basis of Hush's theory.Key words: ammineruthenium complexes, cyanoiron complexes, mixed valence, intervalence, benzotriazole, benzotriazolate.

Mono- and binuclear molybdenum and tungsten complexes containing asymmetric bridging ligands: effects of ligand conjugation and conformation on metal-metal interactions

1993 ◽  
Vol 32 (10) ◽  
pp. 2145-2155 ◽  
Author(s):  
Amitava Das ◽  
John C. Jeffery ◽  
John P. Maher ◽  
Jon A. McCleverty ◽  
Erik Schatz ◽  
...  
Keyword(s):  
Bridging Ligands ◽  
Metal Interactions ◽  
Tungsten Complexes ◽  
Metal Metal ◽  
And Tungsten
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