332401-94-2Relevant articles and documents
Crystal structures and vibrational and solid-state (CPMAS) NMR spectroscopy of some bis(triphenylphosphine)silver(I) sulfate, selenate and phosphate systems
Bowmaker, Graham A.,Hanna, John V.,Rickard, Clifton E. F.,Lipton, Andrew S.
, p. 20 - 28 (2007/10/03)
The crystal structures of [Ag2(PPh3)4(EO4)]· 2H2O (E = S 1 or Se 2) showed that these contain [Ag2(PPh3)4(EO4)] units with three-coordinate silver and EO42- bridging the two silver atoms via two oxygen atoms. The complexes [Ag(PPh3)2(HEO4)]·H2O (E = S 3 or Se 4) contain [Ag(PPh3)2(HEO4)] molecules in which HEO4- is terminally bound to the silver atoms by a single oxygen atom. The complex [Ag(PPh3)2(H2PO4)]·2E tOH 5 contains [Ag(PPh3)2(H2PO4)] molecules in which H2PO4- is terminally bound to the silver atom, which is essentially three-coordinate. Heteronuclear 1J(107/109Ag,31P) and homonuclear 2J(31P,31P) spin-spin coupling constants for these compounds were determined by analysis of their high- (9.40 T) and very high-field (17.62 T) 31P CPMAS NMR spectra, with the aid of the 2-D 31P CPCOSY technique, and a strong inverse correlation was found between 1J(107/109Ag,31P) and the Ag-P bond length. IR and Raman studies show that the effect of a bound proton on the vibrational frequencies of EO42- is much greater than that of an attached metal atom. The Royal Society of Chemistry 2001.
