摘要
报导了双(二苯基膦)丁烷的双核银配合物-[Ag(Ph_2PCH_2CH_2CH_2CH_2PPh_2)-(NO_3)]_2的合成及晶体结构分析。晶体属于单斜晶系,空间群为P2_1/n,晶胞参数为:a=12.821(3),b=11.244(9),c=19.386(9),β=105.94(3)°,V=2687.2~3,Z=2,D_c=1.474g/cm~3,M_r=1192.7,F(000)=1216,μ=8.873cm^(-1)。晶体结构由直接法和Fourier合成解出,使用对角块矩阵和全矩阵最小二乘法对原子参数进行修正,最后偏离因子R=0.056,R_w=0.068,其中2634个I>3σ(Ⅰ)的可观察点参加了结构修正,单晶结构分析结果表明,在该配合物中,配体双(二苯基膦)丁烷(dppb)中的磷原子直接与银离子配位,硝酸根也以双齿配位形式存在,中心银离子的配位采用畸变的四面体构型,整个分子是一个二聚物。
The synthesis and crystal structure of the title complex are reported here.The crystal is monoclinic, space group P2_1/n , a= 12. 821 (3),b= 11. 244(9),c= 19. 386(9) A ,β= 105. 94 (3)°, V= 2687. 2 A ̄3, Z= 2, D_c= 1. 474 g/cm3, Mr= 1192. 7, F(000) = 1216, μ= 8. 873 cm-1. The structure was solved by direct methods and Fourier synthesis, and refined by blockdiagonal and full matrix least-squares method to a final R of 0. 056 , R_w= 0. 068. In the title complex,two phosphorus atoms from two dppb and two oxygen atoms(from nitrate) are coordinated to central ion Ag(I) in tetrahedral geometry. The whole molecule is dimer.
基金
国家自然科学基金
配位化学重点实验室资助