Crystal structure of a zigzag Co coordination polymer: -poly[[di-chlorido-bis-(methanol-κ)cobalt(II)]-μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ:'].

Reaction of bis-(pyridin-3-ylmeth-yl)sulfane () with cobalt(II) chloride in methanol led to the formation of the title coordination polymer, [CoCl(CHNS)(CHOH)] , in which the Co cation lies on a crystallographic inversion centre and the S atom of the ligand lies on a twofold rotation axis. Each Co ion is coordinated by two pyridine N atoms from two bridging ligands, two O atoms from methanol mol-ecules and two chloride anions, all inversion-related. The complex unit has an elongated octa-hedral geometry, in which NO donor atoms occupy the equatorial positions and two chloride anions occupy the axial positions. Each ligand links two Co ions, forming an infinite zigzag chain propagating along the axis direction and further stabilized by O-H⋯Cl hydrogen bonds between the methanol mol-ecules and the chloride anions. Adjacent chains in the structure are connected by inter-molecular C-H⋯Cl hydrogen bonds, resulting in the formation of a three-dimensional supra-molecular architecture.