$\mathrm{ A mixture of }{\mathrm{M(OAc)}}_2·{\mathrm{nH}}_2\mathrm{ O (2\; mmol)\; [M\; =\; Mn\; (Ⅱ),\; Co\; (Ⅱ),\; Cu\; (Ⅱ)],\; LiOH\; and\; ligand\; in\; a}$

$\mathrm{1:2:1 molar ratio was stirred in ethanol (20 mL) at 50℃ for 4h. The crude complexes were filtered off}$

$\mathrm{and then recrystallized from 1:1 water-ethanol. The products were dried in vacuo for 48 h.}$