Effects of ligand substitution on the metal-metal bonding in triosmium carbonyl clusters. The crystal and molecular structures of Os3(.mu.3-S)2(CO)9 and Os3(.mu.3-S)2(CO)8PMe2Ph

1983 ◽  
Vol 2 (1) ◽  
pp. 144-148 ◽  
Author(s):  
Richard D. Adams ◽  
Istvan T. Horvath ◽  
Brigitte E. Segmueller ◽  
Li Wu Yang
Keyword(s):  
Ligand Substitution ◽  
Molecular Structures ◽  
Carbonyl Clusters ◽  
Metal Bonding ◽  
Crystal And Molecular Structures ◽  
Metal Metal ◽  
Triosmium Carbonyl Clusters

Binuclear metal(II) complexes of 1,3-diphenyltriazene : The crystal and molecular structures of the nickel(II), palladium(II) and copper(II) derivatives

1975 ◽  
Vol 28 (11) ◽  
pp. 2377 ◽  
Author(s):  
M Corbett ◽  
BF Hoskins ◽  
NJ McLeod ◽  
BP O'Day
Keyword(s):  
Least Squares Method ◽  
Fourier Method ◽  
Molecular Structures ◽  
Cell Parameters ◽  
Crystal And Molecular Structures ◽  
Metal Atoms ◽  
Metal Metal ◽  
Structure Determinations ◽  
Metal Derivatives ◽  
Binuclear Metal

The crystal and molecular structures have been determined, by single-crystal X-ray methods, for each of the isomorphous set of divalent binuclear metal derivatives of 1,3-diphenyltriazene, abbreviated as dptH, [M(dpt)2]2 where M = Ni, Pd, and Cu. The crystals are composed of discrete molecular units, of composition M2(dpt)4, which have a syn-syn structure analogous to that of copper(II) acetate monohydrate with pairs of closely separated metal atoms held together by the terminal nitrogen atoms of four ligand groups in such a way that the environment of each metal atom is almost square-planar. The interatomic distances between the pairs of metal atoms, 2.395(3), 2563(1), and 2.441(2) Ǻ for the Ni, Pd, and Cu compounds, are strongly suggestive of metal-metal bonding. The two N4-planes are almost parallel but the two sets of coordinating nitrogen atoms are twisted markedly from the eclipsed configuration, the average angle of rotation being about 15°. Crystals of each complex are triclinic with space group P 1. The unit cell parameters in the order of a, b, c, α, β, and γ are 10.335(3), 15.84(1), 13.546(3)& 100.48(5), 94.47(2), 102.57(3)° for Ni2(dpt)4; 10.486(1), 15.791(2), 13.751(1)Ǻ, 99.48(1), 93.61(1), 104.37(1)° for Pd2(dpt)4; 10.373(3), 15.916(5), 13.612(3) Ǻ, 99.51(2), 94.85(3), 102.33(2)° for Cu2(dpt)4. The structure of the nickel complex was solved by the Patterson-Fourier method and the atomic parameters found for this structure were used as the basis of the structure determinations of the isomorphous copper and palladium compounds. All three structures were refined by a block-diagonal least-squares method using 3300 (photographic data) 4065 (counter) and 2753 (counter) independent non-zero terms for the nickel(II), palladium(II) and copper(II) compounds respectively, converging with R values 0.13 (isotropic), 0.056 (anisotropic) and 0.069 (isotropic) respectively.

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