Two heterometallic chain coordination polymers with the chemical formula {[Ni2Co2L2(H2 O)2]·CH3OH·3H2O}n 1 and {[Ni2Zn2L2(H2O)2]·2CH3OH·H2O}n 2，have been synthesized by the assembly reaction of K2NiL·H2O and M(OAC)2(M = Co,Zn) with a 1:1 mole ratio in methanol, and characterized by elemental analysis, and IR spectra. Where H4L = 2-hydroxy-3-[(E)-({2-[(2-hydroxybenzoyl)imino]ethyl}imino)methyl] benzoic acid, OAC- = CH3COO-. The crystal structures were determined by single-crystal X-ray diffraction analyses, the two compounds have chain molecular structures formed by dissymmetrical tetranuclear units.

Key words: Nickle, Cobalt, Coordination polymer, Crystal structure