Synthesis, Characterization and Crystal Structure of Quaternary Complex of Gadolinium （Ⅲ）

A new quaternary mixed anion complex of gadolinium(Ⅲ), [Gd(CH3CH2COO)2(NO3)(phen)]2, was synthesized and structurally characterized. The ESR spectrum of the complex with effective g values of 5.314, 2.473 and 1. 880 in polycrystalline powder at room temperature is quite different from the U spectrum. The coordination number of Gd^3+ is nine with a monocapped square antiprism geometry. And the stacking effect was observed in the complex. The crystal of the complex belongs to triclinic with space group P 1,α= 0.9626(4) nm, b = 0.9732(4)nm, c = 1. 1758(5) nm, α=102.45(1)°, β=108.16(1)°,γ=96.68(2)°, V = 1.0018(7) nm^3, Z=2, Dc=1.80g·cm^-3,μ(MoKα)=33.63mm^-l, F(000) =530, GOF=1.80, R=0.023 and Rw=0.027.