Metal complexes of Group 1B. Part 1. Triphenylphosphinesilver(I) carboxylates
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 20,p. 2068-2070
- https://doi.org/10.1039/dt9770002068
Abstract
An investigation has been made into the mode of co-ordination of carboxylic acids with AgI. From a study of the 1H n.m.r. and i.r. spectra and solution molecular weights the 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]. The two dibasic acids studied, adipic and malonic, show a similar pKa dependence.Keywords
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