Crystal structure and characterization of [Co(saccharinate)2(L1)(H2O)2]n solvate: A new microporous coordination polymer generated from 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene (L1) and [Co(saccharinate)2·4H2O]·2H2O

A new microporous coordination polymer, [Co(saccharinate)2(L1)(H2O)2]n solvate, has been prepared from the reaction of the N,N′ bidentate ligand 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene (L1) with [Co(saccharinate)2·4H2O]·2H2O 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) Å, b = 11.0169(7) Å, c = 11.2369(7) Å, α = 66.2610(10)°, β = 74.4160(10)°, γ = 74.6740(10)°. The structure consists of one-dimensional chains composed of octahedrally coordinated Co(II) centers linked by L1. The packing of these chains, along with intrachain and interchain hydrogen bonds, generates a 3-D framework with infinite channels that are occupied by disordered guest molecules. The compound was further characterized by IR spectroscopy and DTA/TGA.