Carbon-13 NMR Spectroscopy: High-Resolution Methods and by E. Breitmaier

By E. Breitmaier

E. Breitmaier, W. Voelter Carbon-13 NMR Spectroscopy High-Resolution tools and functions in natural Chemistry and Biochemistry 3rd, thoroughly revised variation New concepts and elevated use of pcs have ended in fast improvement in 13C NMR spectroscopy with more desirable instrumental sensitivity and more suitable caliber of the spectra. This necessitated a whole revision whilst the 3rd variation of this profitable monograph was once ready. the recent tools defined comprise these for multiplicity research and two-dimensional homo- or hetero-nuclear shift correlations. As within the moment version, the authors survey the big variety of 13C NMR purposes to natural molecules and ordinary items in a consultant and systematic instead of an exhaustive means. New sections approximately coupling constants, organophosphorus and organometallic compounds in addition to artificial polymers were further. The scope continues to be restricted to high-resolution equipment and molecular structures.

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15), achieved by using the phase shifts indicated above; extrapolation of the linear plot cp ( v ) yields qA= 15" and cpe = + 280"; for correction, the signs have to be changed, thus qA= - 15" and cpB = - 280"; (c) real part after phase correction according to (b).

34 2 Instrumental Methods of I3C NMR Spectroscopy uncorrected (a) '6 D6 corrected - 1 200 : : I I : 150 : : : : I I 100 : : : : 50 : I : ; : 0 6, P P ~ Fig. 13. 63 MHz PFT 13C{1H} NMR spectrum of methyl acetate (20%) in hexadeuteriobenzene (75%) and tetramethylsilane (5%); 256 accumulated pulse interferograms; (a) real part before phase correction; (b) phase correction according to eq. 15), achieved by using the phase shifts indicated above; extrapolation of the linear plot cp ( v ) yields qA= 15" and cpe = + 280"; for correction, the signs have to be changed, thus qA= - 15" and cpB = - 280"; (c) real part after phase correction according to (b).

34 2 Instrumental Methods of I3C NMR Spectroscopy uncorrected (a) '6 D6 corrected - 1 200 : : I I : 150 : : : : I I 100 : : : : 50 : I : ; : 0 6, P P ~ Fig. 13. 63 MHz PFT 13C{1H} NMR spectrum of methyl acetate (20%) in hexadeuteriobenzene (75%) and tetramethylsilane (5%); 256 accumulated pulse interferograms; (a) real part before phase correction; (b) phase correction according to eq. 15), achieved by using the phase shifts indicated above; extrapolation of the linear plot cp ( v ) yields qA= 15" and cpe = + 280"; for correction, the signs have to be changed, thus qA= - 15" and cpB = - 280"; (c) real part after phase correction according to (b).

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