Syntheses and structural characterization of the one dimensional polymers:: 1∞[Rh2(OAc)4(NCPhCN).S], S = CH3COCH3, CH3OH, C2H5OH, C4H8O and C6H6

The syntheses and characterization of five compounds obtained by the reaction of dirhodium(II)tetraacetate with 1,4-dicyanobenzene in different solvent systems are described. The structures of Rh-2(OAc)(4)(NCPhCN). CH3COCH3 (1), Rh-2(OAc)(4)(NCPhCN). 2CH(3)OH (2), Rh-2(OAc)(4)(NCPhCN). C4H8O (4) and Rh-2(OAc)(4)(NCPhCN). C6H6 (5) were determined by single crystal X-ray diffraction. All structures contain one dimensional polymeric chain, comprised of dirhodiumtetraacetate units bridged by 1,4-dicyanobenzene molecules. Solvent molecules are located between the chains in each structure and three different packing arrangements of the polymer chains result from the inclusion of these different solvent molecules. Compounds 1, 2 and 3 crystallize in space group C2/c with similar cell parameters. Compound 4 also crystallizes in the same space group, but its structure is significantly different from those of 1, 2 and 3. Compound 5 crystallizes in space group P (1) over bar and contains an unusual polymer chain structure. (C) 1998 Elsevier Science Ltd. All rights reserved.