Aspects of organocadmium chemistry. II. Crystal and molecular structure of a complex between bis(trimethylsilylmethyl)cadmium and 2,2′-bipyridyl

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Abstract
The crystal structure of bipyridylbis(trimethylsilylmethyl)cadmium(II) hemibipyridyl, [Formula: see text] has been solved and refined to an R-value of 0.140 using 1230 reflections. The space group is P21/c and the cell dimensions are a = 887.4(4), b = 947.0(5), c = 3245.(1) pm, β = 92.01(4)°, with four Cd-containing molecules and two bipyridyl molecules of crystallisation per cell. The 4-coordinate geometry at cadmium is most closely related to that of a linear cadmium dialkyl since the angle C—Cd—C = 156(2)°, and the bipyridyl ligand is weakly bound (Cd—N = 252,253 pm) in a symmetrical manner with the angle N—Cd—N = 65(1)°. The distortion from linearity is away from the bipyridyl. The trimethylsilyl groups are also bent back from the heterocyclic ligand and are slightly staggered. The line between the methylene carbon atoms is approximately perpendicular to the mean plane of the bipyridyl molecule.

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