Digallane synthesis

Summary The synthesis and stmctural characterization of hypersilyl-(=A) substituted digallanes A4Ga2 and [A2Ga2Cl2]2 and tetrahedral [AGa]4 is described. In addition, ah initio calculations are used to understand stabilities of gallium(I)clusters. 

A report on the synthesis, properties and structure of gallaborane was published in 1990 [47]. Since then, a number of articles appeared reporting calculations [7,28,36,48,49] and experimental studies [7]. Table 5 shows the results of our calculations, together with two of the most recent calculations found in the literature [7,36]. Our geometries are in good agreement with experiment [47], with a precision about the same as the calculations on diborane and digallane. Electron... 

Scheme 5.19 Synthesis of Robinson s NHC-digallane 106 and mixed valent NHC2-Gaa cluster 107.

Scheme 5.20 Synthesis of IMes-stabilized digallane and diindanes 109, and [IPr2(AlH2)2] complex 110.

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