The X-RAY Structure of 2,3,5-Tri-O-Acetyl-1, 6-Anhydro-α-D-Galactofuranose
- 1 March 1986
- journal article
- research article
- Published by Taylor & Francis in Journal of Carbohydrate Chemistry
- Vol. 5 (1) , 99-113
- https://doi.org/10.1080/07328308608082646
Abstract
The title compound 1 (C12H16O8), Mr = 288.25, crystallizes in the monoclinic space group P21, with a = 808.8(4), b = 1003.0(5), c = 1762.0(1) pm, .beta. = 101.53(4).degree., V = 1400.5 .times. 106 pm3, z = 4 and two independent molecules in the asymmetric unit. The structure was solved by direct methods and refined to final residual values of R = 0.0512 and Rw - 0.043 for 2159 reflections. The 1,3-dioxane rings of the anhydro bridges adopt chair conformations which are flattened in direction to half chairs (Puckering parameters Q = 60.4 (63.4) pm .PHI. = 137.2 (138.2).degree., .theta. = 18.5 (17.7).degree.). The furanose rings are found in conformations which are intermediate between .degree.E(D) and .degree.T1(D) and differ, therefore, to some extent from those found previously in other anhydrohexofuranoses (Puckering parameters: Q = 45.4 (44.6) ppm, .PHI. = 9.7 (9.7).degree.).This publication has 18 references indexed in Scilit:
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