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Karplus-Conroy equation

Vicinal coupling constants Jhh indicate very clearly the relative configuration of the coupling protons. Their contribution depends, according to the Karplus-Conroy equation... [Pg.42]

The couplings of vicinal protons in 1,2-disubstituted alkenes lie in the range 6-12 Hz for cis protons (dihedral angle 0°) and 12-17 Hz for trans protons (dihedral angle 180°), thus also following the Karplus-Conroy equation. Typical examples are the alkene proton AB systems of coumarin (16a, cis) and tra 5-cinnamic acid (16b), and of the cis-trans isomers 17a and b of ethyl isopente-nyl ether, in addition to those in problems 3, 4, 8, 11, 13 and 38. [Pg.44]

The two curves in Figure 14.32 are obtained from a = 8.5 for O up to 90°, whereas a = 9.5 for O above 90°. The equation is named in honor of Martin Karplus (Austria/United States 1930-) and Harold Conroy (United States). [Pg.693]

See other pages where Karplus-Conroy equation is mentioned: [Pg.44]    [Pg.44]    [Pg.44]    [Pg.148]    [Pg.28]    [Pg.137]    [Pg.44]    [Pg.44]    [Pg.692]    [Pg.44]    [Pg.44]    [Pg.44]    [Pg.148]    [Pg.28]    [Pg.137]    [Pg.44]    [Pg.44]    [Pg.692]   
See also in sourсe #XX -- [ Pg.42 ]

See also in sourсe #XX -- [ Pg.42 ]

See also in sourсe #XX -- [ Pg.42 ]

See also in sourсe #XX -- [ Pg.42 ]

See also in sourсe #XX -- [ Pg.42 ]



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