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Structure of 2',3'-O-isopropylideneguanosine dimethylsulfoxide solvate

Mande, Sharmila S and Seshadri, TP and Viswamitra, MA (1988) Structure of 2',3'-O-isopropylideneguanosine dimethylsulfoxide solvate. In: Acta Crystallographica Section C, 44 . pp. 912-914.

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CI3H17N5Os.C2H6OS, Mr=401.23, orthorhombic,P21212 p grown from Me2SO, a = 10.749 (2),b = 13.219 (2), c = 14.056 (2) A, V= 1997-23 A 3, Z =4, D_=1.40, D x=l.335Mgm -3, 2(CuKa)= 1.5418/~', g = 1.694 mm -~, F(000) = 848.00, T=293K, R =0.0538, wR =0.0634 for 2105 unique reflections with F > 3o(F). The asymmetric unit contains one nucleoside molecule with a disordered solvent Me2S_O molecule. The geometry about the C(4')-C(5') bond is gauche-gauche. The guanosine base is in the anti conformation with the furanose ring having C(3')-exo (E 3) puckering. The bases do not show any stacking in contrast to other guanosine-containing structures. The crystal structure is stabilized by N--H...N and N--H...O hydrogen bonding.

Item Type: Journal Article
Publication: Acta Crystallographica Section C
Publisher: International Union of Crystallography
Additional Information: Copyright of this article belongs to International Union of Crystallography.
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Division of Biological Sciences > Molecular Reproduction, Development & Genetics
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 05 Oct 2010 08:01
Last Modified: 05 Oct 2010 08:01
URI: http://eprints.iisc.ac.in/id/eprint/32953

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