摘要
By mixing hydrated lutetium(Ⅲ) nitrate with Benzo-15-C-5 in 1:1 mole ratio in acetonitrile, the complex[Lu (NO3)3(H2O)2(CH3CN)](Benzo-15-C-5)·CH3CN (C(18)H(30)O(16)N5Lu, Mr=747.5)crystallized. It is the monoclinic,space group P21/n with a=8.535(2),b=16.331(1),c=20.679(5) A and β=99.70 (2)°,Z=4,V=2841(1) A3,Dc=1. 75 g/cm3, F(000)=1488.The final refinement converged with R=0.041 and Rw=0.041 for 2859 observed independent reflections. Lutetium(Ⅲ) is nine-coordinate with three bidentate nitrate groups, two water molecules and one nitrogen atom from acetonitrile molecule. The geometry approximates a monocapped square antiprism. Each water molecule forms hydrogen bonds with two oxygen atoms of one Benzo-15-C-5 molecule resulting in polymeric chains along b axis of…Lu (NO3)3 (H2O)2(CH3CN)/(Benzo-15-C-5)(CH3CN )….The lattice acetonitrile molecules connect the chains with weak hydrogen bonds of C -H O(nitrate). The crown ether adopts a fairly symmetrical conformation in the complex.
