Single Crystal ESR Study of Hctcrotrinuclcar Complex [(NH3)5CoImCu(dicn)ImCo(NH3)5](ClO4)6·4H2O

Abstract

Abstract: Asingle crystal ESRstudy of heterotrinuclear complex [(NH₃)₅CoImCu (dien) ImCo (NH₃)₅] (ClO₄)₆·4H₂O which is diluted with diamagnetic complex [(NH₃)₅CoImZn (dien)ImCo (NH₃)₅](ClO₄)₆·4H₂O has been carried out at 100K. Two sets of ESR spectra were observed for the magnetic field orientations in the ZX and ZY planes. The spin-hamiltonian parameters are rigourously calculated by using the least-square-fitting method, specially adapted to non-coincident g and A tensor systems. Two sets of principal values and the directions of g and A tensors, which are caused due to the disorder of dien group, are given. The electron spin densities in the 4s and 3d orbitals of Cu( Ⅱ ) being 0. 018 and 0. 557 imply that the bonding between Cu( Ⅱ ) and ligands is not purely but mainly covalent.

Key words: Single crystal ESR, Imidazole bridged heterotrinuclear Complex, Copper, Cobalt

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Chen Dong, Han Shiying, Sui Yunxia, Tang Wenxia, Dai Anbang . Single Crystal ESR Study of Hctcrotrinuclcar Complex [(NH₃)₅CoImCu(dicn)ImCo(NH₃)₅](ClO₄)₆·4H₂O[J]. Chem. J. Chinese Universities, 1990, 11(9): 919.

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Single Crystal ESR Study of Hctcrotrinuclcar Complex [(NH₃)₅CoImCu(dicn)ImCo(NH₃)₅](ClO₄)₆·4H₂O

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