Magnetic properties and crystal and molecular structure of µ-oxo-bis[bis-(2-methyl-8-hydroxyquinolinato)iron(III)]–chloroform

Abstract

The crystal structure of the title compound has been established by three-dimensional X-ray single crystal analysis. Crystals are triclinic, space group P, with Z= 2, in a cell of dimensions a= 18·29 (3), b= 11·52(2), c= 13·13(2)Å, α= 89·72(20), β= 127·25(20), γ= 110·95(20)°. Atomic co-ordinates were obtained by Fourier methods and refined by full-matrix least-squares calculations to R 0·126 for 2289 independent reflections. Fe–O–Fe is 151·6°, and with this geometry a pair of 2-methyl-8-hydroxyquinolinato ligands adopt a parallel arrangement. The mean magnetic susceptibilities of the title compound and of the corresponding unsolvated species are discussed in terms of a spin–spin coupling model involving two spin-free iron(III) ions.