Acta Cryst. (2004). E60, m1573-m1575  [ doi:10.1107/S1600536804024249 ]

[(6R,7S,8S,14R)-(-)--Isosparteine-²N,N']bis(nitrito-²O,O')copper(II)

Y.-B. Shim, S.-N. Choi, S. J. Lee, S. K. Kang and Y.-M. Lee

Abstract: In the title complex, [Cu(NO₂)₂(-C₁₅H₂₆N₂)], chiral (6R,7S,8S,14R)-(-)--isosparteine acts as a bidentate ligand, with two nitrite ligands occupying the remaining coordination sites as ²-chelating groups, producing a pseudo-octahedral coordination complex. The molecule of the title complex possesses a crystallographic twofold axis of rotation along a line through the central C atom of the (-)--isosparteine ligand and the Cu^II atom. However, as a result of the Jahn-Teller effect operating on the d⁹ configuration of the copper(II) ion, each nitrite ligand coordinates asymmetrically to the copper(II) centre in a bidentate fashion.

Online 9 October 2004

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