Crystal Structure of 2´x,3´x-Di-O-Acetyl-5´x-Deoxy-5-Fluorocytidine with N--H···(O,F) Proton Donor Bifurcated and (C,N)--H···O Bifurcated Acceptor Dual Three-Center Hydrogen Bond Configurations

Jasinski, Jerry P. and Butcher, Ray J. and Mallesha, L. and Mohana, K. N. and Yathirajan, H. S. and Narayana, B. (2009) Crystal Structure of 2´x,3´x-Di-O-Acetyl-5´x-Deoxy-5-Fluorocytidine with N--H···(O,F) Proton Donor Bifurcated and (C,N)--H···O Bifurcated Acceptor Dual Three-Center Hydrogen Bond Configurations. Journal of Chemical Crystallography, 39 (6). pp. 433-437. ISSN 1572-8854

Text (Full Text) Crystal Structure of 2′,3′-Di-O-Acetyl-5′-Deoxy-5-Fluorocytidine with N–H···(O,F).pdf - Published Version Download (385kB)

Abstract

The title compound, C13H16O6N3F, features a central furan ring containing four carbon atom chiral centers with a 4-amino-5-fluoro-2-oxopyrimidine group, two acetyl groups and a methyl group bonded at the 2,3,4,5 positions, each in an absolute R configuration (2R,3R,4R,5R). It crystallizes in the monoclinic space group C2 with unit cell parameters a = 14.5341(3), b = 7.26230(10), c = 16.2197(3) Å, β = 116.607(2)°, Z = 4. An extensive array of intra and intermolecular hydrogen bond interactions dominate crystal packing in the unit cell highlighted by a relatively rare three-center proton-bifurcated donor N--H···(O,F) hydrogen bond interaction in cooperation with a second, (C,N)--H···O bifurcated acceptor three-center hydrogen bond in a supportive fashion. Additional weak Cg π-ring intermolecular interactions between a fluorine atom and the 4-amino-5-fluoro-2-oxopyrimidine ring in concert with multiple donor and acceptor hydrogen bonds significantly influence the bond distances, bond angles and torsion angles of the deoxy-5-fluorocytidine group. Comparison to a MOPAC computational calculation provides support to these observations.

Item Type:	Article
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	C Swapna Library Assistant
Date Deposited:	06 Nov 2019 09:53
Last Modified:	06 Nov 2019 09:53
URI:	http://eprints.uni-mysore.ac.in/id/eprint/9852

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