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Multinuclear NMR and MS Characterization of Silver(I) Perfluorocarboxylates Complexes with 1,4-Bis(diphenylphosphino)butane

Szymańska I., Goliński A., Pazderski L., Szłyk E

Polish Journal of Chemistry

2007

Vol. 81, nr 3

299-311

Ag(I) perfluorinated carboxylates complexes with 1,4-bis(diphenylphosphino)butane (dppb) of general formulae [Ag2(dppb)(RCOO)2]n, where R = C2F5, C3F7, C4F9, C6F13, C8F17 have been prepared and characterized by MS, 1H, 13C, 19F, 31P NMR and IR spectroscopy. In the solid state Ag(I) compounds are most likely tetranuclear species bridged by both diphosphines and carboxylates, because MS studies revealed multinuclear metallated species with bridging dppb and carboxylates. Variable temperature (VT) 31P NMR spectra demonstrate that studied complexes form binuclear species bonded by diphosphine with intermolecular diphosphine exchange, in chloroform solution. Thermal studies of Ag(I) compounds revealed three stages decomposition processes (exothermic) resulting in metallic silver formation in the range 713-853 K.

The Silver(I) – Complexes of Cyclic Polyamines with Pendant-arm Modification

Wyrwa J., Kira J., Pankiewicz R., Schroeder G.

Polish Journal of Chemistry

2006

Vol. 80, nr 10

1633-1644

The complex formation for two different groups of cyclic polyamines with four or six nitrogen atoms and with pendant-arm modification and silver(I) ions in propylene carbonate has been studied by electron spray ionization mass spectrometry (ESI MS), potentiometric and Austin Model 1 (AM1d) semiempirical methods. The stability constants of complexes are determined by potentiometric method. The structure of those complexes are visualised by AM1d semiempirical calculations.