Abstract
A new manganese(III) complex [HimH][Mn(sal)2(imH)2]CH3OH (sal = salicylate, C7H4O3 2-; imH = imidazole, C3H4N2; [HimH]+ = imidazole cation (C3H5N2) has been prepared and characterized by X-ray analysis and magnetic measurements. The compound crystallizes in the monoclinic space group P2 1 with a = 9.931(2), b = 10.237(1), c = 12.926(7) Å, β = 102.740° and Z = 2. The structure has been refined to R = 0.030 and Rw = 0.031. The Mn(III) ion has elongated octahedral coordination with mutually trans imidazoles occupying axial sites. The equatorial plane is defined by four O atoms of two salicylates. Each [HimH]+ cation (imidazolium) is associated with two complex anions through hydrogen bonds as an imidazolium bridge. The variable temperature magnetic susceptibility for the complex in the temperature range 77-300 K has been interpreted in terms of a single-ion zero-field splitting model with a molecular field term correction. The values obtained for D, g. and zj' are -6.93 cm−1, 2.00 and -0.90 cm−1.
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