A review of 5-O-acetyl-1.2:3.4-di-O-isopropylide α-d-galactoanose 13, belonging to the tetragonal system with the P41 space group, it has been shown to have accepted compliance with the vessel, even though the unprotected α-d-glucoseptanose accepted a revolving chair compliance,4,5TC6.0 . The binding lengths with the septanosid ring showed that the exocyclic C1-O1 (1,378) was significantly shorter than O6-C1 (1,411 degrees) due to the anomic effect. The C-C-C2 (1,537) and C3-C4 (1,551) fastening lengths were significantly longer than the molecule`s other C-C bonds. The binding angles inside the septanosid ring were greater than the value of the tetrahedra. The twisting angles inside the septanosid ring were the values calculated for the vessel`s compliance with the oxyephenenic (Table 13). Analysis of the twisting angles inside the seven-person ring showed that it accepted a conformation of 1.2.5B, where the symmetry plane passed through C5. Molecular structure, ORTEP diagram (40% probability) and torsion angle with septanosid ring are listed in Table 13. The torsion angle of C2-C3-C4-C5 was 12 degrees, indicating that the septamnosering was almost flattened at C3 and C4. This decrease in the torsion angle then increased the torsion angles C1-C2-C3-C4 and C3-C4-C6. The conformation of methyl 2-O-benzoyl-3.4-O-isopropylide-β-d-hexolo-5-ulosis in solution was identified as a stool conformation. Among the coupling constants observed, a remarkable feature of J6a,6b – 18.75 Hz was taken into account by a conformation in which the plane of the ketone-moietys cuts the angle H6a-C6-H6b. The conformation of 33 was therefore identified as 2C5.6.
A structure of methyl solution state 2.5-di-O-acetyl-α-l-idoseptanoside 34 has been reported . The following coupling constants were observed for 34: J1.2 – 6.39 Hz, J2.3 – 10.04 Hz, J3.4 – 9.31 Hz, J4.5 – 8.51 Hz, J5.6a – 5.01 Hz, J5.6b – 4.87 Hz and J6a,6b – 13.61 Hz. These coupling constants could not take into account the conformity of the seats or swivel chairs, but could visualize a consistent balance (Figure 9). The following compliant balance could take into account the observed J values. On the other hand, the Monte Carlo search on 43 first generated 850 configurations inside an energy shutdown value of 5 kcal/mol, optimized with SM5.42/HF/6-31-G. These minimums revealed that conformation 6,OTC4.5 took the overall minimum. The coupling constants theoretically calculated for the 42 and 43 corresponded to the values observed experimentally (Table 18). A solid structure of methyl-5-O-acetyl-2-O-benzo-3.4-O-isopropylide-β-l-idoseptanoide 11 has been reported (Table 12) . The needle crystal belonged to the group of orthorhombes in space P21 21 21 with four molecules in the single cell.
The presence of an anononic effect led to the C1-O1 binding lengths of 1.361 and O6-C1 of 1.42 continuously, positive and negative of the torsion angles, corresponding to the calculated values of oxemains (Table 12) suggesting a conformation of the rotating chair. The values of the C3-C4-C5-C6 torsion angles of -49 and C4-C5-C6-O6 of -32 degrees have defined the average square plane consisting of C4, C5 and C6 atoms. The conformation was therefore attributed to 0.1TC2.3. Analysis of the preparation and structure of the solid body β-d-glucoseptanose-pentaacetate 10 has been reported . Analysis of the twist angle of 10 showed that it was consistent with the torsion angles of the oxephenenanes (Table 11). The crystalline structure of 10 was determined and the conformation of the ring was found as a swivel chair, 5.6TC3,4, in which the axis of symmetry passed through C1. The ORTEP diagram (40% probability) as well as the torsion angles with the septanosid ring are listed in Table 11.