Table 3. Coupling constants (J, Hz) of galactopyranose and glycerol residues of glycolipid derivatives and related reference compounds.
BbGL-I CDCl3 | BbGL-I-Ac3 CDCl3 | BbGL-II CDCl3 | BbGL-II-Ac4 CDCl3 | MGDG CDCl3:CD3OD* | 1,2-Dipalmitin CDCl3 | Me-α-d-Galp D2O | Me-β-d-Galp D2O | |
---|---|---|---|---|---|---|---|---|
J1′,2′ (Gal) | 7.5 | 8.0 | 3.8 | 3.7 | 7.3 | 3.4 | 8.0 | |
J2′,3′ | ND | 10.5 | 9.8 | 10.0 | 9.7 | 10.1 | 9.9 | |
J3′,4′ | 3.2† | 3.5 | 3.2 | 3.5 | 3.3 | 2.8 | 3.5 | |
J4′,5′ | 1.0† | 1.0 | 1.1 | 1.1 | 1.1 | 1.6 | 0.8 | |
J5′,6′a | 6.3 | 6.7 | 5.1 | 6.4 | 6.5 | 6.8 | 7.9 | |
J5′,6′b | 7.2 | 6.7 | ND | 7.0 | 5.4 | 5.5 | 4.4 | |
J6′a,6′b | 11.1 | 11.2 | 11.5 | 11.2 | 11.6 | 11.7 | 11.7 | |
1JC-1′,H-1′ | 158.7 | 157.4 | 170.5 | 172.4 | 160.2 | 170.2 | 160.6 | |
J1″″a,1″″b (Gro) | 11.9 | 11.8 | 12.1 | 11.9 | ||||
J1″″a,2″″ | 4.1 | 4.1 | 3.2 | 4.5 | ||||
J1″″b,2″″ | 5.9 | 6.1 | 6.7 | 5.7 | ||||
J2″″,3″″a | 4.8 | 4.3 | 5.4 | 4.8 | ||||
J2″″,3″″b | 6.2 | 5.2 | 6.0 | 5.2 | ||||
J3″″a,3″″b | 10.9 | 11.2 | 10.9 | 12.2 |
ND, not determined
4:1 vol/vol
In (CD3)2CO:CDCl3 (7:3 vol/vol) solution