A monoclinic polymorph of 2-(4-nitrophenyl)acetic acid

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Kennedy, Alan R. and Silva De Moraes, Lygia (2016) A monoclinic polymorph of 2-(4-nitrophenyl)acetic acid. IUCr Data, 1. x161932. ISSN 2414-3146 (https://doi.org/10.1107/S2414314616019325)

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Abstract

A new monoclinic form of 4-nitrophenylacetic acid, C8H7NO4, (I), differs from the known orthorhombic form both in its molecular conformation and in its intermolecular contacts. The conformation is different as the plane of the carboxylic acid group in (I) is more nearly perpendicular to the plane of the aromatic ring [dihedral angle = 86.9 (3)] than in the previous form (74.5). Both polymorphs display hydrogen-bonded R2 2(8) carboxylic acid dimeric pairs, but in (I), neighbouring dimers interact through nitro–nitro N O dipole–dipole contacts rather than the nitro–carbonyl contacts found in the orthorhombic form.

ORCID iDs

Kennedy, Alan R. ORCID logoORCID: https://orcid.org/0000-0003-3652-6015 and Silva De Moraes, Lygia ORCID logoORCID: https://orcid.org/0000-0001-9176-8725;
  • Item type:Article
    ID code:59071
    Dates:
    Date
    Event
    9 December 2016
    Published
    2 December 2016
    Accepted
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:12 Dec 2016 14:48
    Last modified:11 Nov 2024 11:34
    URI:https://strathprints.strath.ac.uk/id/eprint/59071
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