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The dependence on temperature and concentration of 129 Xe NMR chemical shift values of organoxenon(II) salts [RXe][Y] and of the parent molecule XeF 2
Author(s) -
Bardin Vadim V.,
Frohn HermannJosef
Publication year - 2006
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1799
Subject(s) - chemistry , chemical shift , molecule , analytical chemistry (journal) , organic chemistry
The dependence of the 129 Xe NMR chemical shift value of XeF 2 on temperature and concentration was determined in a variety of prototypic media: in acidic (anhydrous HF, aHF), nonprotic but polar (dichloromethane), and basic (CD 3 CN‐EtCN, 1:3 v/v) solvents. The 129 Xe NMR spectra of a representative series of organoxenon(II) salts [RXe][Y] (R = C 6 F 5 , heptafluoro‐1,4‐cyclohexadien‐1‐yl ( cyclo ‐1,4‐C 6 F 7 ), pentafluoro‐1,4‐cyclohexadien‐3‐on‐1‐yl ( cyclo ‐3‐O‐1,4‐C 6 F 5 ), CF 2 = C(CF 3 ), (CF 3 ) 2 CFC≡C, C 4 H 9 C≡C; Y = BF 4 , AsF 6 ) in aHF showed, compared with XeF 2 aHF, a quantitatively less distinct but qualitatively related dependence of δ( 129 Xe) vs temperature. The dependence of their δ( 129 Xe) values on concentration in aHF is negligible. An explanation for the different behavior of [RXe][Y] and XeF 2 is offered. Copyright © 2006 John Wiley & Sons, Ltd.