摘要
A new nickel citrate compound Ni（H2cit）（phen）（H2O）.3H2O（H4cit = citrate acid,phen = 1,10-phenanthroline） has been synthesized and characterized by single-crystal X-ray diffraction.It crystallizes in the trigonal system,space group P31 with a = 13.8319（13）,c = 10.425（2）,V = 1727.3（4）3,Dc = 1.445 g/cm3,Mr = 501.09,F（000） = 780,μ = 0.901 mm-1,Z = 3,R = 0.0760 and wR = 0.1730 for 3859 observed reflections（I 2σ（I））.In this compound,Ni2＋ cation is chelated by a phen molecule,one H2cit2-anion and one H2O molecule.The citric acid coordinates to the Ni2＋ center through three functional groups：α-hydroxyl,α-carboxylate and β-carboxylate while another α-carboxylate forms hydrogen bond with surrounding H2O molecule.And the citric acid is doubly protonated.The temperature-dependent magnetic susceptibility data revealed that the compound is a paramagnetic material.
A new nickel citrate compound Ni（H2cit）（phen）（H2O）.3H2O（H4cit = citrate acid,phen = 1,10-phenanthroline） has been synthesized and characterized by single-crystal X-ray diffraction.It crystallizes in the trigonal system,space group P31 with a = 13.8319（13）,c = 10.425（2）,V = 1727.3（4）3,Dc = 1.445 g/cm3,Mr = 501.09,F（000） = 780,μ = 0.901 mm-1,Z = 3,R = 0.0760 and wR = 0.1730 for 3859 observed reflections（I 2σ（I））.In this compound,Ni2＋ cation is chelated by a phen molecule,one H2cit2-anion and one H2O molecule.The citric acid coordinates to the Ni2＋ center through three functional groups：α-hydroxyl,α-carboxylate and β-carboxylate while another α-carboxylate forms hydrogen bond with surrounding H2O molecule.And the citric acid is doubly protonated.The temperature-dependent magnetic susceptibility data revealed that the compound is a paramagnetic material.
基金
supported by the National Basic Research Program of China (973 program, No.2007CB815601)
