Springer Online Journal Archives 1860-2000
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Abstract On the basis of the localized molecular orbital (LMO) theory, the bonding schemes for the following types of cluster compounds are briefly reviewed in this paper; the linear [Et4N][Cl2FeS2MoS2Cu(PPh3)2] cluster, triangular trinuclear [M 3(μ3−X)(μ−Y 3]4+ (M = Mo, W;X = O, S;Y = O, S, Se) clusters, triangulated polyhedral clusters: closo-boranes B n H n 2−, octahedral [Co6(CO)14]4−, [Ni2Co4(CO)14]2− and [Co6(μ3 −X 8 ·L 6 n+ (X = S, Se;L = PPh3, PEt3, CO;n = 0,1) as well as quasi-aromatic cluster ligands in cubane-type [Mo3S4 ·ML n (4 +q) + (M = Mo, W, Fe, Ni, Cu, Sn, Sb;L = Ligand and sandwich-type [Mo3S4 ·M · S4Mo3]8+ (M = Mo, Sn, Hg). We put emphasis upon the characteristics of multicentered bonding in these cluster molecules, and, especially, point out existence of a novel species of quasi-aromatic cluster compounds.
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