Crystal and molecular structure of an unsubstituted bis(phenoxo)-derivative of copper(II), the [{Cu(OPh)2(en)}2]·2PhOh dimer, with a ‘normal’ magnetic moment at room temperature

Abstract

The title compound has been shown by X-ray diffraction methods to be a centrosymmetric phenoxo-bridged dimer with terminal phenoxo- and ethylenediamine groups and hydrogen-bonded phenol molecules. The crystals are monoclinic, space group P2₁/n, and the unit cell has dimensions a= 19.000(13), b= 10.930(9), c= 8.968(5)Å, β= 89.90(2)°, U= 1 862.4 ų, and Z= 4. The structure was refined by three-dimensional Patterson and Fourier techniques up to a conventional R value of 0.0437. The copper atoms are five-co-ordinate and the co-ordination geometry is that of a distorted square pyramid. The Cu ⋯ Cu distance is 3.215 Å. The compound has a nearly normal magnetic moment at room temperature and the results of the present investigation are discussed in connection with the known magnetic and structural data for dimeric oxygen-bridged copper(II) complexes.