膦桥双核银配合物[Ag(dppm)NO_3]_2的合成与结构

Synthesis and Structure of[Ag(dppm)NO_3]_2

[Ag(dppm)NO_3]_2晶体属单斜晶系,空间群 Cc.单脆参数:α=1.2704(1),b=1.7028(2),c2.2634(5)nm;β=100.66(1)°;Z=4;V=4.8117 nm^3;Do=1.530g·cm^(-3).两个双齿膦配体 dppm连结两个银离子形成一个扭曲八元环.Ag—Ag 间距离为0.3089nm.硝酸根以不对称配位方式与银离子配位.结构测定的最后偏离因子 R=0.050.

The crystal of the title complex,C_(50)H_(44)Ag_2N_2O_6P_4,Mr=1108.67,belongs tomonoclinic system,space group Cc,with dimensions:a=1.2704(1),b=1.7028(2),c=2.2634(5)nm;β=100.66(1)°;V=4.8117 nm_3;Z=4;Dc=1.530 g·cm^(-3);μ=9.851 cm^(-1);F(000)=2240.0.The two Ag atoms in the molecule are associated respectively with four terminalphosphorus atoms of two dppm molecules.Each Ag atom is of four coordinates.TheNO_3~1 anion donates asymmetryoally through two oxygen atoms coordinating to each Agatom.The distance between two Ag atoms in the molecule is short,0.3089 nm,butthere is no bonding between them.