Acta Crystallographica Section C

Crystal Structure Communications

Volume 58, Part 8 (August 2002)

Acta Cryst. (2002). C58, m447-m449 [doi:10.1107/S0108270102011307]

Bis{[diphenyl(piperidinomethyl)silyl]methyl}cadmium and -magnesium

C. Strohmann and D. Schildbach

Abstract: The homoleptic and monomeric metal alkyls bis{[diphenyl(piperidinomethyl)silyl]methyl}cadmium, [Cd(C₁₉H₂₄NSi)₂] or [Cd{CH₂SiPh₂(CH₂NC₅H₁₀)}₂], (I), and bis{[diphenyl(piperidinomethyl)silyl]methyl}magnesium, [Mg(C₁₉H₂₄NSi)₂] or [Mg{CH₂SiPh₂(CH₂NC₅H₁₀)}₂], (II), (CH₂NC₅H₁₀ is piperidinomethyl) are isostructural, and the molecules exhibit crystallographically imposed C₂ symmetry. The metal centres are located on special positions and, for each structure, half of the molecule is located in the asymmetric unit. The metal centres are intramolecularly coordinated and stabilized by two piperidinomethyl groups (side-arm donation). The Si-C and M-C bonds (M is Cd or Mg) are shortened compared with the corresponding non-metallated compounds, indicating stabilization by the diffuse polarizable Si centres ( [alpha] effect). The C-M-C angle is 140.53 (12)° in (I) and 123.39 (11)° in (II).

Formula: [Cd(C₁₉H₂₄NSi)₂] and [Mg(C₁₉H₂₄NSi)₂]

Online 20 July 2002


	Structure factor file (CIF format) (183.3 kbytes) Contains datablock I

	Structure factor file (CIF format) (155.0 kbytes) Contains datablock II

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