Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 4 (April 2008)

metal-organic compounds

 

Low-dimensional compounds containing cyano groups. XVI. (Dicyanamido-N¹)bis(1,10-phenanthroline-²N,N')copper(II) tetrafluoridoborate

I. Potocnák, M. Spilovský and Z. Trávnícek

Abstract: The title compound, [Cu{N(CN)₂}(C₁₂H₈N₂)₂]BF₄, was prepared as part of our study of the shape of coordination polyhedra in five-coordinated copper(II) complexes. Single-crystal X-ray analysis reveals that the structure consists of [Cu{N(CN)₂}(phen)₂]⁺ cations (phen is 1,10-phenanthroline) and BF₄^- anions. The Cu centre is five-coordinated in a distorted trigonal bipyramidal manner by four N atoms of two phen ligands and one N atom of a dicyanamide anion, which is coordinated in the equatorial plane at a distance of 1.996 (2) Å. The two axial Cu-N_phen distances have similar values [average 1.994 (6) Å] and are shorter than the two equatorial Cu-N_phen bonds [average 2.09 (6) Å]. This work demonstrates the effect of ligand rigidity on the shape of coordination polyhedra in five-coordinated copper(II) complexes.

Formula: [Cu(C₂N₃)(C₁₂H₈N₂)₂]BF₄

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