Mechanochemical Synthesis in Chemistry of Cluster Systems
V. V. VOLKOV, K. G. MYAKISHEV, M. N. SOKOLOV, V. P. FEDIN, A. L. GUSHCHIN and E. A. IL'INCHIK
Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences,
Pr. Akademika Lavrentyeva 3, Novosibirsk 630090 (Russia)
E-mail: cluster@che.nsk.su
Pages: 155-163
Abstract
Mechanochemical reactions for the synthesis of cluster compounds of higher boranes, carboranes, and transition metal complexes with structural metal chalcogenide cluster fragments containing [Nb2], [W3] and [Mo3] are reviewed. These are typical systems in cluster chemistry. Reactions were performed by mechanical activation (MA) of mixtures of starting crystalline substances in hermetically sealed vibratory ball mills. A brief overview of basic definitions and concepts of cluster chemistry and mechanochemistry is presented. The results of studies on six types of mechanochemical reaction on cluster compounds are summarized. Published data on the experimental technique for reactions performed under conditions of MA are given. MA can change the structure or composition of the cluster nucleus, or lead to elimination of structural cluster fragments from coordination polymers; it can also lead to exchange of the ligand surroundings of the nucleus-forming atoms, and to formation of discrete molecules or ionic saltlike compounds containing clusters. Solid-phase redox reactions on transition metal atoms can take place during formation of heteroatomic metallocarboranes.
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