MOLECULAR-STRUCTURE OF [(TRIEN)ZN(IM)ZN(TRIEN)](CLO4)(3) COMPLEX AND ESR-SPECTRA OF ITS SINGLE-CRYSTAL DOPED WITH [(TRIEN)CU(IM)ZN(TRIEN)](CLO4)(3) COMPLEX

The crystal structure of the title complex was measured, in which the two zinc atoms with coordination polyhedron of distorted tetragonal py ramid (TP) are bridged by an imidazolate in the apical position of the TP forming a dimer. The isomorphous [(trien)Cu(im)Zn(trien)](ClO4)(3) . H2O complex was doped in the title complex and the recorded single- crystal ESR spectra by fitting gave two sets of the principal values o f g and A tensors, which were assigned to the physically distinct site s of the two magnetically equivalent molecules in the unit cell. Latti ce distortion at the Cu(II) ion sites and the bonding parameters of Cu (II) ions are further calculated, and the bonding nature of Cu(II) ion s is discussed.