Synthesis and Crystal Structure of a New Complex {[CoIIIL2]•[CoII(H2O)6]0.5•2.25H2O}4 (H2L = N-(2-Hydroxyphenyl)salicylidenimine)

The reaction of Co(OAc)(2)center dot 4H(2)O with the Schiff base H2L in a methanol solution affords the red crystals of {[(CoL2)-L-III]center dot[Co-II(H2O)(6)](0.5)center dot 2.25H(2)O}(4) 1 (H2L = N-(2-hydroxyphenyl) salicylidenimine). The molecular and crystal structures were determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P2(1)/n, C104H114Co6N8O37, M-r = 2421.61, a = 10.625(3), b = 16.335(4), c = 15.265(4) angstrom, beta = 102.990(4)degrees, V = 2581.6(11) angstrom(3), Z = 1, D-c = 1.558 g/cm(3), mu = 1.034 mm(-1), F(000) = 1252, R 0.0414 and wR = 0.1167 for 5889 reflections. The Co(III) atom is six-coordinated by two nitrogen atoms and four oxygen atoms of two tridentate L ligands. The abundant hydrogen bonding interactions extend the complex into a one-dimensional supra- molecular framework. The uncoordinated water molecules act as space-fillers and consolidate the whole architecture through the hydrogen bonding interactions.