Polymorphism of Dibromo-tetrakis(tetrahydrofuran-kappa O)magnesium(II)

Abstract

The title compound, [MgBr(2)(C(4)H(8)O)(4)] (1a), forms twinned four-component monoclinic crystals as a new polymorph, space group P2(l)/n with Z' = 2, in addition to the already known tetragonal polymorph (1b). Although the molecular parameters in the two polymorphs match very well, the packing patterns are significantly different. Furthermore, the correct constitution of the mixed halide bromo-chloro-tetrakis(tetrahydrofuran-kappa O)magnesium(II) (2) could be determined.