Metal complexes of Group 1B. Part 1. Triphenylphosphinesilver(I) carboxylates
作者:Colin Oldham、William F. Sandford
DOI:10.1039/dt9770002068
日期:——
silver atoms in the complexes are all four-co-ordinate but the stoicheiometry depends on the pKa of the acid. All the acids studied form complexes of stoicheiometry [Ag(O2CR)(PPh3)2](R = Me, CH2Cl, CHCl2, Ph, C6H4Me-o, C6H4Me-m, or C6H4OH-o). In addition, for acids having pKa > 3.9 (i.e. R = Me, Ph, C6H4Me-o, or C6H4Me-m) chelation of the acid to the silver results in a complex of storcheiometry [Ag(O2CR)(PPh3)2]
已经研究了羧酸与Ag I的配位方式。通过对1 H nmr和ir光谱以及溶液分子量的研究,络合物中的银原子都是四坐标的,但化学计量学取决于酸的p K a。所有被研究的stoicheiometry形成复合物将[Ag(O酸2 CR)(PPH 3)2 ](R = Me中,CH 2氯,三氯甲烷2中,Ph,C 6 H ^ 4 ME- ø,C 6 H ^ 4 ME-米或C 6 H 4 OH-o)。此外,对于具有p酸ķ一个> 3.9(即R =我中,Ph,C 6 H ^ 4 ME- Ò,或C 6 H ^ 4 ME-米)的酸到银结果在复杂storcheiometry的螯合[ Ag(O 2 CR)(PPh 3)2 ]。所研究的两种二元酸,己二酸和丙二酸,显示出相似的p K a依赖性。