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Closed Access item An experimental study of the (4h)J(P-31-P-31) coupling constant and the C-12/C-13 isotope effect on P-31 in an iminophosphorane-substituted proton sponge

Authors:Elguero, José
Fruchier, Alain
Jimeno, M. Luisa
Molina, Pedro
Keywords:Isotope Shifts, Coupling Constants Through Hydrogen Bonds, Proton Sponges
Issue Date:2002
Publisher:Science Reviews Limited
Citation:Journal of Chemical Research 2002(1) : 34-36 (2002)
Abstract:The 13C NMR spectra of the bromide of the protonated iminophosphorane-substituted sponge 7 were recorded at different fields. Together with the use of 13C satellites of the 31P NMR spectrum, these experiments allow determination of a reasonable set of chemical shifts and coupling constants. The most interesting are a 4hJPP = 1.6 Hz, determined directly from the 31P NMR spectrum, which probably involves the hydrogen bond, and a 2Δ31P(13C) isotope shift of 9 ppb.
Publisher version (URL):http://www.ingentaconnect.com/content/stl/jcr/2002/00002002/00000001/art00016
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