Coherence transfer in nuclear magnetic resonance by selective homonuclear Hartmann-Hahn correlation spectroscopy

1991 ◽  
Vol 113 (24) ◽  
pp. 9135-9140 ◽  
Author(s):  
Robert Konrat ◽  
Irene Burghardt ◽  
Geoffrey Bodenhausen
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Correlation Spectroscopy ◽  
Coherence Transfer ◽  
Nuclear Magnetic

Quantitative 13C N.M.R. Assay and Assignment of Mixtures from Lipase Digestion of Propane-1,2-diol Dibutyrate

1999 ◽  
Vol 52 (2) ◽  
pp. 123 ◽  
Author(s):  
Charmian J. O'Connor ◽  
Richard H. Barton
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Polarization Transfer ◽  
Correlation Spectroscopy ◽  
Two Dimensional ◽  
13C Nuclear Magnetic Resonance ◽  
Inductive Effects ◽  
Nuclear Magnetic

13C nuclear magnetic resonance (n.m.r.) spectra were obtained at 50 and 100 MHz for mixtures of propanediol, propane-1,2-diol dibutyrate, propane-1,2-diol 1-butyrate and propane-1,2-diol 2-butyrate in CDCl3. Distortionless enhancement by polarization transfer (DEPT) and two-dimensional 13C–1H correlation spectroscopy were used to confirm shift assignments. Spectra for the 1- and 2-monoesters showed strongly different inductive effects due to the position of the butyryl chain. These experiments demonstrate the desirability of using 13C n.m.r. rather than 1H n.m.r. spectroscopy in quantitative speciation of acylated diol complex hydrolysis mixtures.

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