Abstract

Powder e.s.r. spectra are reported for manganese(II) ions doped into Mg(hfac) 2L, Zn(acac) 2L (hfac = hexafluoro-acetylacetone, L = bipyridyl or o-phenanthroline). Cd(acac) 2bipyridyl and Cd(acac) 2· o-phenanthroline·H 2O, and the zero-field spitting parameters D and λ (= E/D) are derived. Distortions from octahedral symmetry are greater for the bipyridyl than for the o-phenanthroline complexes, and greater for cadmium than for the other two metal ions. Infrared studies show all the complexes to be tris-bidentate except for Cd(acac) 2· o-phen·H 2O, which probably has a free carbonyl group and coordinated water.

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