Abstract
Two new dinuclear μ-cyano complexes, cis-[(en)(tn)FCrNCPt(CN) 3] and cis-[(chxn)(tn)FCrNCPt(CN) 3] en=ethylenediamine, tn=1,3-diaminepropane and chxn=1,2-cyclohexanediamine) have been obtained by solid state heating of the trans[Cr(aa)(bb)F(H 2O)][Pt(CN) 4] salts. These complexes have been characterized by chemical analysis, electronic and IR spectra. The dinuclear complexes show strong PtPt interaction both in the solid state and in solution. The association constant of the oligomers formed has been calculated and correlated with the size of the amine ligands. An orbital explanation is proposed to account for the enhancement of the PtPt interaction in the dinuclear complexes relative to the complex salts.
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