Synthesis and crystallographic characterization of a seven‐coordinate Mn(II) complex

Abstract

AbstractA seven‐coordinate Mn(II) complex of N,N,N ′,N ′‐tetrakis[(2‐benzimidazolyl)methyl]‐1,2‐cyclohexanediamine (CDTB), namely, [Mn(CDTB)(DMF)](Pic)2·C2H5OH was synthesized and characterized by elemental analyses, IR spectra and X‐ray single‐crystal diffraction. The complex crystallizes in a typical hybrid organic‐inorganic pattern. The crystal belongs to the monoclinic system, space group P 2 (1) / n with cell constants a = 13.3343(6) Å, b = 33.7015(16) Å, c = 13.7286(6) Å, β = 108.9990(10)°, Z = 4. The structure was solved by direct methods and refined to R = 0.0561 (wR2 = 0.1172). The structure analysis reveals that the Mn(II) has a capped octahedron geometry with seven‐coordination mode, furthermore, the [Mn(CDTB)(DMF)]2+ building blocks were extended into well‐ordered supramolecular networks by complementary hydrogen bonds, and the linkers of the ethanol molecules and the picrate anions play an important role in the self‐assembly process. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)