1H NMR chemical shifts and coupling constants of some 3-monosubstituted 2-methylpropenes
1H NMR chemical shifts and proton-proton coupling constants for some 3-substituted 2-methylpropenes [YCH2C(Me)CH2, Y = H, Cl, Br, I, OH, OMe, OEt, SH, SMe, SEt, NMe2 and NEt2] are reported. Resonances of the olefinic protons were assigned through lanthanide-induced shifts. Chemical shifts of the ole...
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1997
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07491581_v35_n3_p147_Rittner http://hdl.handle.net/20.500.12110/paper_07491581_v35_n3_p147_Rittner |
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| Sumario: | 1H NMR chemical shifts and proton-proton coupling constants for some 3-substituted 2-methylpropenes [YCH2C(Me)CH2, Y = H, Cl, Br, I, OH, OMe, OEt, SH, SMe, SEt, NMe2 and NEt2] are reported. Resonances of the olefinic protons were assigned through lanthanide-induced shifts. Chemical shifts of the olefinic protons (HA and HB) showed a dependence on the substituent at C-3 of the allylic fragment. Long-range allylic coupling constants (4Jcisoid for HA and CH2 and HB and Me; 2Jtransoid for HB and CH2 and HA and Me) were determined by spectral expansion and simulation. © 1997 by John Wiley & Sons, Ltd. |
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