Synthesis, structure and magnetic property of μ-phenoxo-μ-acetato-bis(η2-acetato)dicobalt(II, II) complexes

Dinuclear cobalt(II) complexes Co2(bpmp)(OAc)3 (1) and Co2(bpcp)(OAc)3 (2) have been synthesized by using acyclic ligands 2,6-bis((4-(pyridin-2-yl)pyrimidin-2-ylthio)methyl)-4-methylphenol [H(bpmp)] and 2,6-bis((4-(pyridin-2-yl)pyrimidin-2-ylthio)methyl)-4-chlorophenol [H(bpcp)] with versatile coordination sites. X-ray analysis uncovered that complex 1 · 3H2O contains a μ-phenoxo-μ-acetato-bis(η2-acetato) dicobalt(II, II) core. Magnetic susceptibility was measured for 1 over the temperature range 1.8–300 K, and the best theoretical fitting parameters were g = 2.12(6), J = −3.63(9) cm−1 and D = −12(4) cm−1.