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Correlation via long-range couplings

Two-dimensional C//correlations such as C//COSY or HC HMQC and HSQC provide the Jqh connectivities, and thereby apply only to those C atoms which are linked to H and not to non-protonated C atoms. Modifications of these techniques, also applicable to quaternary C atoms, are those which are adjusted to the smaller Jqh and Jqh couplings (2-25 Hz, Tables 2.8 and 2.9) Experiments that probe these couplings include the CH COLOC (correlation via long range couplings) with carbon-13 detection (Fig. 2.16) and HC HMBC (heteronuclear multiple bond coherence) with the much more sensitive proton detection (Fig. 2.17)... [Pg.39]

COLOC correlation via LOng-range Coupling (CH multiplicities through two or three bonds)... [Pg.140]

Bermel W, Wagner K, Griesinger C (1989) Proton-detected C,H correlation via long-range couplings with soft pulses determination of coupling constants. J Magn Reson 83 223-232... [Pg.84]

COSY = homonuclear chemical shift correlation spectroscopy NOESY = 2D nuclear Overhauser effect (NOE) spectroscopy HMQC = heteronuclear mulltiple-quantum coherence RELAY = relayed coherence transfer COLOC = correlation via long-range coupling HMBC = heteronuclear long-range coupling INADEQUATE = incredible natural abundance double quantum transfer experiment. [Pg.156]

Two-dimensional carbon-proton shift correlation via long-range CH coupling... [Pg.39]

CH COLOC Correlation via long-range CH coupling, detects CH connectivities through two or three (more in a few cases) bonds in the CH COSY format, permits localisation of carbon nuclei two or three bonds apart from an individual proton... [Pg.266]

HMBC Heteronuclear multiple bond correlation, inverse CH correlation via long-range CH coupling, same format and information as described for ( C detected) CH COLOC but much more sensitive (therefore less time-consuming) because of H detection... [Pg.266]

This is a variation of the proton-detected shift-correlation experiment via long-range couplings proposed by Bax and Summers (Bax and Summers, 1986), with the difference that the first C pulse is substituted by a frequency selective pulse (Fig. 7.14) (Bermel et al., 1989 Kessler et al., 1989b,1990). This significantly increases resolution in the F dimension. For example, this can be used to remove the overlap between the cross-peaks of the carbonyl resonances of peptide bonds in proteins that all occur within a... [Pg.376]

COLOC correlation spectroscopy via long-range couplings... [Pg.312]

COLOC correlation spectroscopy via LOng-range Couplings... [Pg.250]

See other pages where Correlation via long-range couplings is mentioned: [Pg.96]    [Pg.180]    [Pg.39]    [Pg.173]    [Pg.539]    [Pg.361]    [Pg.96]    [Pg.180]    [Pg.39]    [Pg.173]    [Pg.539]    [Pg.361]    [Pg.259]    [Pg.44]    [Pg.47]    [Pg.222]    [Pg.222]    [Pg.287]    [Pg.120]    [Pg.192]    [Pg.358]    [Pg.27]    [Pg.180]    [Pg.287]    [Pg.222]    [Pg.259]    [Pg.20]   
See also in sourсe #XX -- [ Pg.539 ]



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