Metal clusters bonding

A detailed account of the descriptive chemistry of the heavier transition metals is beyond the scope of this book. Many aspects of the chemistry of these elements such as metal-metal multiple bonds, metal clusters, organometallic chemistry, and coordination chemistry are discussed in other chapters. The present discussion will be limited to a comparison of the similarities and differences of the heavier metals and their lighter congeners. 

Pentagonal bipyramidal Dinuclear (4° bond) Metal cluster... 

Boron Hydrides Chemical Thermodynamics Hydrogen Bond Metal Cluster Chemistry Metal Forming Superconductivity... 

The predominant species observed in SIMS spectra are singly charged atomic and molecular ions [51], However, inorganic and organic cluster ions can also be formed. If the sample consists of a simple single-component metal, then clusters such as M, M, etc., are observed in addition to M+ [52], Oxidation of the metal results in formation of MO ", MO/, M Oll", etc. The relative yield of MO+ to M+ depends on the bond dissociation energy of the oxide [52], For a two-component, oxidized metal, clusters of the type M/", M N, MjO, and M N O/ are observed [51]. 

Figure 10.9 Some examples of metal sequences and metal clusters containing tin-transitional metal bonds.

Numerous examples oF metal carbonyls will be found in later chapters dealing with the chemistry of the individual transition metals. CO also has an unrivalled capacity for stabilizing metal clusters and for inserting into M-C bonds (p. 309). Synthetic routes include ... 

Mercury has a marked ability to bond to other metals. In addition to the amalgams aheady mentioned (p. 1206) it acts as a versatile structural building block by forming Hg-M bonds with cluster fragments of various types e.g. reduction... 

Recent results in the chemistry of transition metal clusters with organic ligands. H. Vahrenkamp, Struct. Bonding (Berlin), 1977, 32, 2-56 (408). 

Developments in transition metal cluster chemistry — the way to large clusters. G, Schmid, Struct. Bonding (Berlin), 1985,62, 51 (132). 

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