One-dimensional structures of manganese(II) complexes [Mn II(hfac) 2L] hfac = hexafluoroacetylacetonate anion; L = N-(4-pyridylmethyl)imidazole, trans-1,2-bis(4-pyridyl)ethylene, imidazole)

Abstract

Bis(hexafluoroacetylacetonato)diaquamanganese(II) [Mn(hfac) 2(H 2O) 2] reacts with N-(4-pyridylmethyl)imidazole (pyim), trans-1,2-bis(4-pyridyl)ethylene (bpye) and imidazole (Him) to give their adducts with three different kinds of one-dimensional structures [Mn(hfac) 2(pyim)] ( 1), [Mn(hfac) 2(bpye)] ( 2) and [Mn(hfac) 2(Him) 2] ( 3), respectively. Compound 1 crystallizes in the monoclinic space group P2 1 n with a = 9.696(3), b = 14.839(4), c = 17.076(3) A ̊ , β = 92.70(2)°, and assumes a one-dimensional structure running along the b-axis in which the adjacent molecules are related by a two-fold screw axis. Compound 2 crystallizes in the space group C2 c with a = 9.554(2), b = 16.476(2), c = 16.137(2) A ̊ , β = 96.97(2)°, and assumes a zigzag-chain structure. Compound 3 crystallizes in the space group P2 1 c with a = 7.526(3), b = 14.506(3), c = 10.394(2) A ̊ , β = 96.71(2)° and the one-dimensional structure of 3 is formed by a hydrogen bond between NH of imidazole and O of hfac.