Acta Cryst. (2009). E65, m1137-m1138  [ doi:10.1107/S1600536809033327 ]

Butylbis[-4-(2,4,6-trimethylphenylamino)pent-3-en-2-onato][4-(2,4,6-trimethylphenylamino)pent-3-en-2-onato]dimagnesium

R. T. Boeré and T. Gietz

Abstract: The structure of the title compound, [Mg₂(C₄H₉)(C₁₄H₁₈NO)₃], contains two Mg atoms bridged by two ₂-O atoms from two of the three ketiminate ligands, while the third ketiminate is strictly chelating to one of the Mg atoms, which is thereby five-coordinate. In place of a chelating ligand, the second Mg atom is ligated by a single terminal n-butyl group and thus is four-coordinate. This is, so far, the only structurally characterized mixed magnesium ketiminate-alkyl cluster. The geometry at the first Mg atom is close to trigonal-bipyramidal with one chelating and one bridging O atom in the axial positions and two chelating N and one bridging O atom in the equatorial positions. The geometry at the second Mg atom is very distorted from tetrahedral, with an O-Mg-C angle of 131.0 (1)°.

Online 29 August 2009

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