Crystal structure of poly[[μ-4-(hydroxymethyl)pyridine-κ2N:O][4-(hydroxymethyl)pyridine-κN](μ-thiocyanato-κ2N:S)(thiocyanato-κN)cadmium]

Abstract

The crystal structure of the title compound, [Cd(NCS)2(C6H7NO)2]n is made up of Cd2+ cations that are coordinated by three thiocyanate ligands and three 4-(hydroxymethyl)pyridine ligands within distorted N4OS octahedra. The asymmetric unit consists of one Cd2+ cation, two thiocyanate anions and two 4-(hydroxymethyl)pyridine ligands in general positions. Two Cd2+ cations are linked by two μ-1,3 N- and S-bonding thioycanate anions into dimers which are further linked into branched chains along [100] by two μ-1,6 N- and O-bonding 4-(hydroxymethyl)pyridine ligands. One additional N-bonded 4-(hydroxymethyl)pyridine ligand and one additional N-bonded thiocyanate anion are only terminally bonded to the metal cation. Interchain O—H...S hydrogen bonds between the hydroxy H atoms and one of the thiocyanate S atoms connect the chains into a three-dimensional network.

Keywords

• crystal structure
• coordination polymer
• cadmium
• octahedral coordination
• hydrogen bonding