Acta Cryst. (2007). E63, m1975-m1976  [ doi:10.1107/S1600536807030073 ]

(3-Carboxypyridine-2-carboxylato-²N,O)(4'-phenyl-2,2':6',2''-terpyridine-³N,N',N'')copper(II) tetrafluoridoborate

S. Martínez-Vargas, R. A. Toscano and J. Valdés-Martínez

Abstract: The title compound, [Cu(C₇H₄NO₄)(C₂₁H₁₅N₃)]BF₄, was obtained from an attempt to use 3-carboxypyridine-2-carboxylate as an N,O-bidentate ligand with the carboxyl group as an intermolecular hydrogen-bond site to organize the molecules in the crystal structure. Unfortunately, instead of an intermolecular hydrogen bond, an intramolecular O-HO hydrogen bond was observed, and the molecules are organized by van der Waals and - stacking interactions [3.770 (2) Å]. The metal center has a square-pyramidal geometry, with the 4'-phenyl-2,2':6',2''-terpyridine coordinated in a tridentate manner in basal positions and the 3-carboxypyridine-2-carboxylate ligand coordinated as a bidentate ligand with the pyridine N atom basal and the O atom of the carboxylate group apical. The F atoms are disordered over three sites with occupancies of approximately 2:1:1.

Online 22 June 2007

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