Comproportionation compounds, mixed

The GED structure determination of 3 showed a centrosymmetric molecule with a linear C—Mg—C center (4). On evaporation of 3, which is trimeric in benzene solution and probably polymeric in the crystalline state, dissociation into monomeric molecules occurs. The structure obtained is in accordance with the considerations in Section I,C. Important geometric parameters of the structure are the distances Mg—C (2.126 A) and C—C (1.541 A) and the angle Mg—C—C (118°). By fusion of3 and 2, the mixed crystalline compound 4 (m.p. 70-72°C) was obtained. The structure of this compound, which is stable toward comproportionation to... 

Without additional reagents Mixed diorganomercury compounds by comproportionation... 

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