Crystal structure and characterization of a new open-framework coordination polymer generated from Co[(saccharinate).sub.2]6[H.sub.2]) and 1,4-Bis(3-pyridyl)-2,3-diaza-1,3-butadiene. (South Carolina Academy of Sciences Abstracts).

A new coordination polymer containing open channels has been prepared from the reaction of Co[(saccharinate).sub.2]6[H.sub.2]) with the bidentate ligand 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene (L2) in a methylene chloride/ethanol solvent mixture. The compound crystallizes in the triclinic system, space group P-1, with lattice parameters a= 7.6893 (5) [Angstrom], b= 11.0169 (7) [Angstrom], c= 11.2369 (7) [Angstrom], [alpha]= 66.2610 [(10).sup.[omicron]], [beta]= 74.4160 [(10).sup.[omicron]], [gamma]=74.6740 [(10).sup.[omicron]]. The structure consists of one-dimensional chains formed by octahedrally coordinated Co(II) ions that are bridged by L2. The packing of these chains generates a framework with infinite channels parallel to the crystallographic a axis. Further stabilization of the framework is achieved through interchain and interehain hydrogen bonds between coordinated water molecules and sacchrinate anions. Disordered guest molecules, which could not be crystallographicaily modeled, occupy the channels. The synthesis, characterization, and inclusion chemistry of this material will be presented.

Harvey Davis, H. zur Loye, LeRoy Peterson, Jr.
Department of Chemistry, Francis Marion University
Department of Chemistry, University of South Carolina