Carbohydrates bonds, carbon-proton coupling

K. Bock and C. M. Pedersen, Determination of one-bond carbon—proton coupling constants through 13C-satellites in -n.m.r. spectra, Carbohydr. Res., 145 (1985) 135-140. 

I. Tvaroska and F. R. Taravel, One-bond carbon-proton coupling constants Angular dependence in a-linked oligosaccharides, Carbohydr. Res., 221 (1991) 83-94. 

I. Tvaroska, Dependence on saccharide conformation of the one-bond and three-bond carbon-proton coupling constants, Carbohydr. Res., 206 (1990) 55-64. 

Carbohydrates. The conformational flexibility of lactose in solution has been investigated by residual dipolar couplings. One-bond carbon-proton and proton-proton coupling constants have been measured in two oriented media and interpreted in combination with molecular dynamics simulations. Two different approaches have been used to determine the alignment tensor from a... 

There are various hybrid 2-D correlation experiments that combine features of two simpler 2-D experiments. A popular and useful example is the HMQC-TOCSY spectrum that correlates one-bond H—13C couplings (HMQC) but shows these correlations throughout an entire spin system (TOCSY). This experiment simplifies complex carbohydrate and peptide systems and allows ready assignments of systems of protons and carbons. 

I. Tvaroska, M. Hricovmi, and E. Petrakova, An attempt to derive a new Karplus-type equation of vicinal proton-carbon coupling constants for C-O-C-H segments of bonded atoms, Carbohydr. Res., 189 (1989) 359-362. 

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