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3 Polish Journal of Chemistry

3 2005

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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.

Solid-State CP/MAS P-31 NMR in Studies of the Aminophosphonic Acids and Esters in Marine Animals

Jankowski S.

Polish Journal of Chemistry

2005

Vol. 79 / nr 3

573-581

For the first time the 31P solid-state NMR CP/MAS technique was applied to determine the amount of C-P forms in the total phosphorus in sea anemones. Signals of phosphonates (ca 20 ppm) and phosphates (ca 0 ppm) are well resolved and the phosphonate/ phosphate ratios were easily calculated. Sea anemones Anemonia sulcata from the Adriatic Sea contain 41-54% of phosphorus as phosphonates (P-C). 31PNMRanalysis of lipids was also performed.

Mechanism of Decomposition of Quasiphosphonium Intermediates: Borderline SN1 Character of Alkyl-Oxygen Fission in sec-Alkyloxyphosphonium Salts

Hudson H., Qureshi A.

Polish Journal of Chemistry

2005

Vol. 79 / nr 3

473-480

alkyl diphenylphosphinites ROPPh2 (R = Et, Pri, Bus , and 3-pentyl) with iodomethane at room temperature. Phosphorus chemical shifts for the sec-alkoxy(methyl)diphenylphosphonium iodides (_P 68.6-68.7 ppm) are at slightly higher field than for ethoxy(methyl)diphenylphosphonium iodide (_P 72.4 ppm), in accord with higher electron density at phosphorus in the secondary alkyl sytems. Relative rates of decomposition in CDCl3 (Me > Et > Pri >> neopentyl) are in accord with SN2-type cleavage of the R-O bond but within the secondary alkyl series the relative rates (Pri