[Gd(Gly)3(H2O)2]Cl3·H2O的合成与晶体结构

氯化钆;甘氨酸;固态配合物;[Gd(Gly)3(H2O)2]Cl3·H2O的合成与晶体结构

Synthesis and CrystalStructure of [Gd(Gly)3(H2O)2]Cl3· H2O

The title complex was synthesized in an aqueous solution (pH=4～5). Its single crystalwas obtained by slow evaporation and characterized by IR, XRD and thermal analysis. The crystal be-longs to orthorhombic with a space group P212121: a=1.1960(2) nm, b=3.0 789(6) nm, c=0. 47652 (10) nm, Z=4, Dc=1.987 g/cm3. The crystal is a one-dimentional chain complex. The neighbor-ing two Gd3+ ions are connected by two simple bridged carboxyl groups and a μ2-bridging carboxylgroup. Each G-d3+ ion is simuetaneosly coordinated by two water molecules. So the coordination num-ber of Gd3+ is nine, forming a coordination polyhedron of distorted mono capped square antiprism.The coordination polyhedron is the first reported example for rare earth glycine (1 : 3) complexes.The bond enthalpies of coordination bonds were gained for the title complex.