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Analysis of ABX spin systems in some 1,4-dihydro-1λ5, 4λ5-diphosphinines: Signs of 31P—13C coupling constants and isotope effects (1995)

Heckmann, Gernot ; Fluck, Ekkehard

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 33 (1995), S. 553-556

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ISSN: 0749-1581

Schlagwort(e): NMR ; 13C NMR ; 31P NMR ; 1,4-dihydro-1λ5,4λ5-diphosphinines ; ABX spin systems ; sign of 2J(PC),4J(PC) coupling constants ; isotope effects ; 3J(PP) ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The ABX spin systems of the [mono-13C]isotopomers with vinylic and phenyl ipso-13C atoms of a number of symmetrical 1,4-dihydro-1,4-diphenyl-1λ5,4λ5-diphosphinines were analysed. The substituent dependence of the absolute signs and magnitudes of 2J(PC) between the two 31P nuclei and two vinylic 13C atoms and of the 4J(PC) and 3J(PP) are reported. 13C isotope effects on δ(31P) and 3J(PP) are discussed.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/mrc.1260330710

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