Synthesis and characterization of manganese(III) hydroxyl-containing Schiff-base complexes: [Mn(III)(Hvanpa)(2)(NCS)] and [Mn(III)(Hvanpa)(2)]Cl center dot H2O (H(2)vanpa=1-(3-methoxysalicylaldeneamino)-3-hydroxypropane)

The manganese complexes, [Mn(III)(Hvanpa)(2)(NCS)] (1) and [Mn(III)(Hvanpa) (2)]Cl . H2O (2), have been prepared and the crystal structure of complex 2 determined using X-ray crystallography. The monomeric complex has a six-co ordinate octahedral geometry. The complex crystallizes in the triclinic spa ce group P-1 with a = 11.446(5) Angstrom, b = 12.782(6) Angstrom, c = 9.023 (3) Angstrom, alpha = 93.92(3)degrees, beta = 97.05(3)degrees, gamma = 65.4 2(2)degrees, V = 1169.0(9) Angstrom(3) and Z = 2. The Mn-O and Mn-N distanc es in the equatorial plane are in agreement with those found for other mang anese (III) Schiff-base complexes. In the axial direction, the Mn-O distanc es of 2.256(3) and 2.236(3) Angstrom, respectively, are about 0.4 Angstrom longer than those in the equatorial plane due to Jahn-Teller distortion at the d(4) manganese(III) center. In the crystal, each chloride ion is linked through hydrogen bonding with two hydrogen atoms from the coordinated hydr oxyl groups at the apical site. The lattice water molecules also interact w ith the phenolic oxygen atoms through hydrogen bonding.