Crystal structures, spectral and magnetic properties of cobalt(II) pyridinecarboxylates: A novel polymeric chain in {[{2,6-(MeO)2nic}2(H2O)2Co(μ-H2O)Co(H2O)4(μ-H2O)]{2,6-(MeO)2nic}2 · 6H2O}n

Synthesis and characterization of two new cobalt(II) complexes, namely monomeric [Co(2-MeSnic)2(H2O)4] · 4H2O (2-MeSnic is 2-methyl-thionicotinate) and polymeric {[{2,6-(MeO)2nic}2(H2O)2Co(μ-H2O)Co(H2O)4(μ-H2O)]{2,6-(MeO)2nic}2 · 6H2O}n (2,6-(MeO)2nic is 2,6-dimethoxynicotinate), are reported. Crystal structures of both complexes have been determined. In both of them, the CoII atom is six-coordinated. In the 2nd complex, there are two nonequivalent CoII central atoms. One of them is octahedrally coordinated by a carboxyl oxygen atom of 2,6-(MeO)2nic, two water molecules and the corresponding centrosymmetrically located atoms. The second CoII atom is also octahedrally coordinated by six water molecules.