Isolation and X-ray structure of [C5H4C(CH3)(C3H7)CH2CHCH2]Ln(OH)Cl·2MgCl2·4THF (Ln=Nd, Gd)

Abstract

Abstract The trichlorides of lanthanum, neodymium, samarium and gadolinium react with an equivalent amount of [C5H4C(CH3)(C3H7)CH2CHCH2]MgCl in THF at room temperature to give [C5H4C(CH3)(C3H7)CH2CHCH2]LnCl2·MgCl2·THF (Ln=La (1), Nd (2), Sm (3), Gd (4)). Complexes 2 and 4 are recrystallized from moist THF–hexane to give the partial hydrolytic crystal [C5H4C(CH3)(C3H7)CH2CHCH2]Ln(OH)Cl·2MgCl2·4THF(Ln=Nd (5), Gd (6)). These compounds have been characterized by 1H-NMR spectra, as well as by single-crystal X-ray analyses (5 and 6). The coordination geometries of Nd (III) and Gd (III) are seriously distorted. The coordination number of Mg is six and the coordination geometry is a distorted octahedron.