Crystal and molecular structures of two thermally interconvertible metallocarborane isomers, 1,8,5,6- and 1,7,5,6-(.eta.5-C5H5)2Co2C2B5H7. Reversible metal-metal bond formation in a polyhedral surface

1976 ◽  
Vol 15 (9) ◽  
pp. 2274-2278 ◽  
Author(s):  
Russell N. Grimes ◽  
Allan. Zalkin ◽  
Ward T. Robinson
Keyword(s):  
Bond Formation ◽  
Molecular Structures ◽  
Polyhedral Surface ◽  
Metal Bond ◽  
Crystal And Molecular Structures ◽  
Metal Metal

Metal-metal bond formation and rearrangement of the S2CPR3 ligands in binuclear manganese-molybdenum complexes. X-ray structure of [MnMo(SnPh3)(CO)6(.mu.-S2CPPr-iso3)]

1993 ◽  
Vol 12 (8) ◽  
pp. 2888-2890 ◽  
Author(s):  
Daniel Miguel ◽  
Julio A. Perez-Martinez ◽  
Victor Riera ◽  
Santiago Garcia-Granda
Keyword(s):  
Bond Formation ◽  
Molybdenum Complexes ◽  
X Ray ◽  
Metal Bond ◽  
Metal Metal

Dinitrogen Fixation versus Metal-Metal Bond Formation in the Chemistry of Vanadium(II) Amidinates

1994 ◽  
Vol 116 (16) ◽  
pp. 7417-7418 ◽  
Author(s):  
Pietro Berno ◽  
Shoukang Hao ◽  
Ravinder Minhas ◽  
Sandro Gambarotta
Keyword(s):  
Bond Formation ◽  
Dinitrogen Fixation ◽  
Metal Bond ◽  
Metal Metal

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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