Germane tetraphenyl

GelCeHslalsN Tris(triphenyl-germyl)amine, 6 78 GelCgHsla Germane, tetraphenyl-, 6 70, 73, 78... 

The first chiral nonracemic germanes were prepared from the tetraphenyl derivative through a series of successive electrophilic and nucleophilic substitutions as illustrated in Scheme 1. Brook and Peddle were able to separate the diastereomeric (—)-menthyloxy derivatives 1 and 2 by fractional crystallization1. Treatment of each diastereomer with LiAlFLt afforded the (+) and (—) enantiomeric hydrides R-3 and S-3, respectively,... 

The molecular structure of compound 84 in the gaseous phase was analysed by electron diffraction. It has chair conformation with Cs symmetry. The axial methyl groups are twisted outwards to relieve steric repulsion259. The symmetry of gaseous tetraphenyl-germane is debatable on the basis of its electron diffraction spectrum260. Hexamethyl-distannane (MesSnSnMes) has D3 symmetry in the gas phase, as shown by electron diffraction261. 

Sodium, (diphenylgermyl)di-, formation of, from tetraphenyl-germane and sodium in liquid ammonia, 5 72... 

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