polyaminopolycarboxylate; triethylenetetraaminehexaacetic acid; crystal structure; magnetic property
【摘要】
The bimetallic complex of Ni2Co(TTHA)12H2O (TTHA = triethylene tetraminehexaacetic acid) was synthesized and characterized structurally and magnetically. The title complex crystallizes in the triclinic space group P 墨 with a = 0.7316(2), b = 0.8624(2), c = 1.5041(4) nm; 伪 = 73.38(2), 尾 = 83.97(2), 纬 = 70.50(2)°. The crystal structure is built up of [Ni2(TTHA)(H2O)2]2-, Co(H2O)62+ and water molecules. The variable magnetic measurement shows that there is strong antiferromagnetic interaction between two Ni(II) ions in [Ni2(TTHA)(H2O)2]2- with JNi-Ni = -141.64 cm-1, gNi = 2.21 and that the constant of spin-orbit coupling of Co(II) ion is -134.8 cm-1.
