FAC-[CO(C5H4NOS)(3)]CENTER-DOT-H2O.1 2CH(3)OH AND FAC-[CO(C5H4NOS)(3)]CENTER-DOT-1/3CH(3)OH/

Crystals of tris(2-mercaptopyridine N-oxido)cobalt-(III) monohydrate h emimethanol solvate, fac-[Co(C5H4NOS)(3)].H2O.1/2CH(3)OH (1) contain f ac-[Co(III)(mpo)(3)] (Hmpo = 2-mercaptopyridine N-oxide), H2O and MeOH molecules linked by hydrogen bonds. The asymmetric unit consists of t wo molecules of the cobalt complex, two water and one methanol molecul e. The asymmetric unit of the closely related comelex tris(2-mercaptop yridine N-oxido)cobalt(III) 1/3-methanol solvate, fac-[Co(C5H4NOS)(3)] .1/3CH(3)OH (2), contains three discrete Co(mpo)(3) molecules and one MeOH molecule which is linked to one of the Co(mpo)(3) units via a hyd rogen bond. The Co-III complex molecules in (1) and (2) do not differ significantly. Each Co atom is coordinated by an O3S3 donor set which defines a distorted facial octahedron. Three mpo ligands are chelated to each Co atom, the average O-Co-S bite angle is 87.5 (2) for (1) and 87.4 (2)degrees for (2). The average CO-S and Co-O distances are 2.20 5 (3) and 1.942 (2) Angstrom, respectively, for (1), and 2.205 (3) and 1.951 (5) Angstrom, respectively, for (2).