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Published on: December 11, 2013
Bis[[diphenyl(piperidinomethyl)silyl]methyl]cadmium and -magnesium
Carsten Strohmann1, Daniel Schildbach
1Institut für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. c.strohmann@mail.uni-wuerzburg.de
Abstract:
The homoleptic and monomeric metal alkyls bis[[diphenyl(piperidinomethyl)silyl]methyl]cadmium, [Cd(C(19)H(24)NSi)(2)] or [Cd[CH(2)SiPh(2)(CH(2)NC(5)H(10))](2)], (I), and bis[[diphenyl(piperidinomethyl)silyl]methyl]magnesium, [Mg(C(19)H(24)NSi)(2)] or [Mg[CH(2)SiPh(2)(CH(2)NC(5)H(10))](2)], (II), (CH(2)NC(5)H(10) is piperidinomethyl) are isostructural, and the molecules exhibit crystallographically imposed C(2) 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) degrees in (I) and 123.39 (11) degrees in (II).
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