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

Abstract Synthesis and characterization of two new cobalt(II) complexes, namely monomeric [Co(2-MeSnic)2(H2O)4] · 4H2O (2-MeSnic is 2-methylthionicotinate) 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. The characterizations were based on elemental analysis, infrared and electronic spectra as well as magnetic measurements. Crystal structures of both complexes have been determined. In both of them – ([Co(2-MeSnic)2(H2O)4] · 4H2O and {[{2,6-(MeO)2nic}2(H2O)2Co(μ-H2O)Co(H2O)4(μ-H2O)]{2,6-(MeO)2nic}2 · 6H2O}n) – the CoII atom is six-coordinated. In the 2nd complex, there are two nonequivalent CoI…