Abstract
Spectral and molecular model computations on homo-dinuclear complexes [M2L2(H2O)(2)Cl-2] [L = 1-(salicylaldeneamino)-3-hydroxypropane, M = Cr3+, Mn3+, Fe3+, Co3+, Ni3+ or Cu3+] are consistent with a distorted hexa-coordinate geometry. X-band EPR spectral data indicated a rhombic distortion around Cu(II) ion. Magnetic moment and Fe-57 Mossbauer data confirmed a high-spin state electronic configuration (t(2g) (3)e(g)(2), S = 5/2) and asymmetric ligand environment around Fe(III) with nuclear transitions Fe(+/-3/2 -> 1/2) exhibiting Kramer's double degeneracy. The neighboring Fe(III) nuclei in the homo-dinuclear species are antiferrornagnetically coupled. (C) 2009 Elsevier B.V. All rights reserved.