Article

2-[(2-Acet-oxy-benzo-yl)-oxy]benzoic acid.

University of Southern Denmark, Department of Physics, Chemistry and Pharmacy, Campusvej 55, 5230 Odense, Denmark.
Acta Crystallographica Section E Structure Reports Online (Impact Factor: 0.35). 07/2012; 68(Pt 7):o2108. DOI: 10.1107/S1600536812026475
Source: PubMed

ABSTRACT The title compound, C(16)H(12)O(6), is a common impurity of ortho-acetyl-salicylic acid (aspirin). The benzene rings form a dihedral angle of 81.9 (1)° while the acetyl and carboxyl groups form dihedral angles of 74.0 (1) and 26.4 (2)°, respectively, with the benzene rings to which they are bound. In the crystal, mol-ecules are linked by pairs of O-H⋯O hydrogen bonds between the carboxyl groups, forming inversion dimers.

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