CRYSTAL STRUCTURE OF LANTHANUM (Ⅲ) COMPLEX WITH CRYPTAND [2,2,1]:H_2[2,2,1]·[La(NO)_3)_2·[2,2,1]]·La-(NO_3)_6·CH_3CN

<正> C34H69La2N13O34(Mr= 1418. 9) belongs to orthorhombic system, space group Pcab with a = 15. 513(3), b = 19. 463(5), c=38. 014(5)(?); Z = 8; V = 11477(4)(?)3; F(000) = 6000; μ=16.1cm-1(MoKa). The final R and Rw are 0. 045 and 0. 045, respectively. The molecule is Composed of one H22,2,1]2+, one La(NO3)22,2, 1]]+, one La(NO3)63- and one solvent molecule CH3CN. The La3+ in La-(NO3)2· 2,2,1]]+ is 11-coordinated by four oxygen atoms from two bidentate NO3- and seven heteroatoms from a 2,2,1] molecule; the La3+ ion in La (NO3)63- is coordinated to six bidentate NO3-. The La - O distances fall in the range of 2. 60-2. 70(?) and the La-N(cryp) mean distance is 2. 88(?).