Crystal structure, spectral and thermal properties of tetrakis(acetato) bis(methyl-3-pyridyl carbamate) dicopper(II) di(methanol)

The crystal and molecular structure of the tetrakis(acetato) bis(methyl-3-p yridyl carbamate) dicopper(II) di(methanol), [Cu(CH3COO)(2)(mpc)](2). 2CH(3 )OH (mpc = methyl-3-pyridylcarbamate), was determined by direct method and Fourier techniques. The compound crystallizes in the triclinic system. The structure was refined by full-matrix least-squares methods to a weighted R factor of 0.0590, based on independent reflections. The compound is dimeric with square pyramidal geometry at each copper centre. The two copper(II) a toms are bridged by four carboxylate groups, while the apical ligands are m ethyl-3-pyridylcarbamates. The Cu-Cu distance is 2.633(12) Angstrom. The Cu atoms are displaced by 0.215 Angstrom from the plane containing four oxyge n atoms towards the apical methyl-3-pyridylcarbamates. Spectral data of the compound are also discussed. The structural data are compared with those f ound in similar copper(II) acetates.