Acta Cryst. (2002). E58, m304-m306  [ doi:10.1107/S1600536802009066 ]

A seven-coordinate pyridine-2,6-dicarboxylate-bridged cadmium(II) complex, at 110  K

M. Ranjbar, H. Aghabozorg and A. Moghimi

Abstract: The reaction of cadmium(II) chloride monohydrate with a self-assembling pyridine-containing ligand, LH₂ {LH₂ is [H₂pyda]²⁺[pydc]^2-, where pyda = 2,6-diaminopyridine and H₂pydc = pyridine-2,6-dicarboxylic acid}, in water leads to the formation of a centrosymmetric dinuclear Cd^II complex, di--pyridine-2,6-dicarboxylato-bis[triaquacadmium(II)], [Cd(pydc)(H₂O)₃]₂·2H₂pydc or [Cd₂(C₇H₃NO₄)₂(H₂O)₆]·2C₇H₅NO₄. Each Cd atom is seven-coordinate and has a distorted pentagonal-bipyramidal geometry. The two metal fragments are linked via the central four-membered Cd₂O₂ ring and there is no [Hpyda]⁺ moiety in the structure of the complex. The structure self-assembles into layers via hydrogen bonds.

Online 24 May 2002

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