Die molekül- und kristallstruktur von bis-(dimethylgallium)-oxalat[(CH3)2Ga]2C2O4

Bis(dimethylgallium) oxalate crystallizes in the triclinic space group P1−. The unit cell has lattice constants a = 6.503 Å, b = 8.014 Å, c = 5.892 Å, α = 77.6°, β = 114.5° and γ = 102.1° and contains one molecule. Gallium is surrounded by a distorted tetrahedron of two carbon atoms and two cis-standing oxygen atoms of the oxalate group. The Ga2C2O4-group forms an almost planar system composed of two fused five-membered rings. Interatomic distances and bond angles indicate that with respect to the bonding between the dimethylgallium- and oxalato group considerable ionic contributions have to be considered.