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• W2902158688 endingPage "697" @default.
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• W2902158688 abstract "Azidothymidine (AZT) is a first anti-HIV drug namely Zidovudine used for HIV treatment, which binds to the viral DNA primer and inhibits the HIV reverse transcription. The side effects of this powerful drug are severe and the detailed understanding of its electronic structure helps to design new drugs from the AZT molecule. Present study aims to determine the structure of AZT at electronic level from the experimental charge density analysis as well as the solid state DFT calculations. AZT was crystallized and low temperature high resolution X-ray diffraction intensity data has been measured up to sin (θ/λ)max = 1.1 Å−1 at 100.0 (2) K. The crystal structure of AZT was determined, which reveals the information that the AZT compound crystallizes with two molecules in the asymmetric unit which are conformationally different and linked through strong hydrogen bonding interactions (dimer). The Hirshfeld surface of both molecules shows the locations of weak and strong interactions. Further, a multipole model refinement was carried out using Hansen-Coppens multipole formalism. The experimental topological properties of electron density of AZT molecules were determined and compared with the results of theoretical DFT calculations based on solid state and gas phase studies. The charge density distribution of the two molecules in the asymmetric unit is unequal and shows some difference. The topological properties of O–H⋅⋅⋅O, O–H⋅⋅⋅N, C–H⋅⋅⋅N, H⋅⋅⋅H and azide⋅⋅⋅azide group interactions are also determined. The electrostatic potential (ESP) surface of both AZT molecules in the crystal exhibits high electronegative regions around the O, N atoms and also around the azide group, however, ESP regions of molecules (I) and (II) are not similar." @default.
• W2902158688 created "2018-12-11" @default.
• W2902158688 creator A5005738980 @default.
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• W2902158688 date "2019-03-01" @default.
• W2902158688 modified "2023-09-27" @default.
• W2902158688 title "Topology of electron density and electrostatic potential of HIV reverse transcriptase inhibitor zidovudine from high resolution X-ray diffraction and charge density analysis" @default.
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• W2902158688 doi "https://doi.org/10.1016/j.molstruc.2018.11.098" @default.
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