双核铜配合物[Cu2{Ph3P(CH2)2CO2}4(NO3)2]·(NO3)2的合成与结构研究

报道一种新的四羧基桥联桨轮状二铜配合物的合成与晶体结构表征 .该配合物属于 P1空间群 ,其晶胞参数为 a=12 .65 2 (3 ) ,b=18.983 (4) ,c=9.10 2 (3 ) ,α=97.2 6(2 )°,β=10 7.3 8(2 )°,γ=10 2 .2 2 (2 )°.研究结果表明 ,在该配合物中轴向配位位置被硝酸根离子占据 .而轴向硝酸根离子上对 Cu2 的配位显著增加了 Cu… Cu间的距离 (2 .73 8 )

SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF A NEW tetrakis-(CARBOXYLATO-O,O') BRIDGED DICOPPER COMPLEX WITH TRIPHENYLPHOSPHINOPROPIONATE

A novel binuclear copper (Ⅱ) complex,namely Cu2{Ph3P(CH2)2CO2}4(NO3)2].(NO3)2 1,has been synthesized from the reaction of Cu(NO3)2.4H2O with Ph3P+(CH2)2CO-2 L.The single-crystal X-ray structural analysis of 1 indicates that the compound crystallizes in space group P(1)(No.2) with a＝12.652(3)(A),b＝18.983(4)(A),c＝9.102(3)(A),α＝97.26(2)°,β＝107.38(2)°,γ＝102.22(2)° and Z＝1.In complex 1,a pair of Cu(Ⅱ) atoms are bridged by carboxylate groups of four ligand molecules with a Cu...Cu distance of 2.738(A) to form a tetrakis-(carboxylato-O,O') bridge dimetal core,and the apical coordination positions are occupied by monodentate nitrato anions,which is rare in the structures of similar Cu(Ⅱ) complexes in which the apical ligands are usually neutral molecules.The result shows that introducing the anionic ligands into the coordination sphere of the Cu(Ⅱ) atom significantly increases the Cu...Cu distance.