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Vibrational analysis and chemical activity of paracetamol-oxalic acid cocrystal based on monomer and dimer calculations: DFT and AIM approach
Physics Department, University of Lucknow.
Luleå University of Technology, Department of Health Sciences, Medical Science.ORCID iD: 0000-0001-7469-4197
Physics Department, University of Lucknow.
Physics Department, University of Lucknow.
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2016 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 6, no 12, p. 10024-10037Article in journal (Refereed) Published
Abstract [en]

The study of structural and spectral characteristics of a paracetamol-oxalic acid (PRA-OXA) cocrystal has been carried out using two models (monomer and dimer), with the aim to understand the supramolecular structure and intramolecular interactions within the cocrystal. The cocrystal has been characterized by infrared and Raman spectroscopy combined with quantum chemical calculations molecular electrostatic potential surface (MEPS), frontier orbital analysis and electronic reactivity descriptors were used to understand the role of interactions involved in affecting the chemical reactivity of individual molecules in the cocrystal. It is observed that the C=O, N-H and O-H groups of paracetamol are involved in hydrogen bonds to form cocrystals. NBO analysis suggests that the two types of interactions LP(1)(N8) -> pi*(C9-O10) and LP(2)(O10) -> sigma*(O25-H28) are responsible for the stability of the molecule. AIM analysis suggested that the non-covalent interactions are moderate in nature. The calculated HOMO-LUMO energies reveal that the charge transfer occurs within the cocrystal. Chemical reactivity parameters show that the cocrystal is more active than paracetamol.

Place, publisher, year, edition, pages
2016. Vol. 6, no 12, p. 10024-10037
National Category
Other Health Sciences
Research subject
Health Science
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URN: urn:nbn:se:ltu:diva-2886DOI: 10.1039/c5ra24402aISI: 000369516100079Scopus ID: 2-s2.0-84961387671Local ID: 09ce6d30-d195-4c06-821a-8ed436c6c1ffOAI: oai:DiVA.org:ltu-2886DiVA, id: diva2:975740
Note
Validerad; 2016; Nivå 2; 20160304 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Shimpi, ManishkumarVelaga, Sitaram

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