Manganese(II) complex of the ‘tripod’ ligand tris(2-benzimidazolylmethyl)amine. Seven-coordinate Mn(II) in the crystal structure
摘要:
Mn(II) coordination compounds with tripodal N,N,N-tris-(2-benzimidazolylmethyl)amine (TMBA) have been synthesized and spectrescopically characterized. The crystal structure of [Mn(TMBA)(NO3)(CH3OH)](NO3)H2O has been determined. The compound crystallizes in the monoclinic space group P2(1)/c with four formula units in a cell of dimensions a = 11.3825(2), b = 13.4338(2), c = 17.9548(3) Angstrom, beta = 100.026(1)degrees; final R = 0.0299, based on 4745 independent reflections. The structure indicates the complex ion has a heptacoordinate metal center with a coordination polyhedron best described as capped octahedron. The octahedron is defined by three nitrogen atoms from the benzimidazole moieties (N(1A),N(1C) and N(1B)), the oxygen atom of the methanol O(41), and two oxygen atoms from the coordinating nitrate group O(11) and O(12). The capping ligating atom is the bridging N(1) from the TMBA ligand with a longer Mn-N distance of 2.551(1) Angstrom.