Synthesis and spectroscopic, magnetic and EPR studies of di-#mu#-hydroxo-bis[(NN)(N-phenyl-2-pyridinamine)copper(II)]hexaflourophosphate, with NN = 2,2'-bipyridine or 1,10-phenanthroline. X-ray crystal structure of the 2,2'-bipyridine complex

摘要

Binuclear complexes [{Cu(NN)(PhNHpy)}_2(#mu#-OH)_2](PF_6)_2, where NN = 2,2'-bipyridine (bipy) or 1,10-phenanthroline (phen), have been synthesized and characterized by chemical analysis, conductance measurements and IR and electronic spectroscopy. The X-ray crystal structure of [{Cu(bipy)(PhNHpy)}_2(#mu#-OH)_2](PF_6)_2 shows a distorted square-planar pyramidal coordination for Cu(II), defined by two nitrogen atoms of bipy, two bridging oxygen atoms and the pyridinic nitrogen atom of the ligand. Magnetic susceptibility measurements (in the 4.8-290 K range reveal coupling which is antiferromagnetic for the bipy complex (2J = -24.2 cm~(-1)) and slightly ferromagnetic for the phen complex (2J = 3.3 cm~(-1)). The EPR spectra show the expected triplet signals.