SPECTROSCOPIC AND X-RAY STRUCTURAL STUDY OF THE COPPER(II) COMPLEX WITH SCHIFF BASE BETWEEN PYRIDOXAL AND BENZYLAMINE
- 1 December 1981
- journal article
- research article
- Published by Taylor & Francis in Journal of Coordination Chemistry
- Vol. 11 (3) , 185-193
- https://doi.org/10.1080/00958978108079068
Abstract
Bis(N-benzylpyridoxaldiminato) copper(II) has been prepared and studied in solution and solid state. The complex crystallizes in the monoclinic space group C2h 5 – P21/a in a cell of a = .9561(9), b = 16.605(8), c = 17.561(2) Å and β = 104.14(l). Based on 3684 unique reflections, the structure was refined by fullmatrix least-squares techniques to a conventional agreement factor (on F) of R = 0.045. Each ligand is bidentate through the phenolic oxygen and the imino nitrogen atoms, leading to a tetrahedrally distorted square planar environment about the copper atom. The dihedral angle between the two chelating moieties is 35.31°. The two benzyl groups are, surprisingly, in a cis position with respect to the mean plane of the molecule. In solution, the ESR data are consistent with a distorted square planar structure around Cu. Under particular conditions two sets of ESR signal are observed, suggesting the occurrence of two species.Keywords
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