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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.

Synthesis and Characterization of Ionic Cu(I) Perfluorocarboxylate Compounds with 1,4-Bis(diphenylphosphino)butane

Szymańska I., Pazderski L., Kucharek R., Szłyk E.

Polish Journal of Chemistry

2005

Vol. 79 / nr 11

1705-1711

A series of ionic Cu(I) perfluorocarboxylate compounds with 1,4-bis(diphenyl - phosphino)bu tane (dppb) of gen eral formula [Cu(dppb)2](RCOO), where R = C2F5, C3F7, C4F9, C6F13, C8F17, was prepared and characterized with MS, IR and 1H, 13C, 19F, 31P NMR spectroscopy. The studied species contained monomeric, bis-chelated [Cu(dppb)2]+ cations and uncoordi nated RCOO- anions. The Cu(I) coordi nation of the diphosphines resulted in slight high-frequency shifts of the 31P NMR resonances of the equivalent phosphorus atoms.