2-(4-Nitrophnoxy)benzoic acid: a three-dimensional hydrogen-bonded framework in a triclinic structure having Z' = 3.

The title compound, C₁₃H₉NO₅, crystallizes in space group P&1macr;, with Z' = 3. The molecules are linked by O-H···O hydrogen bonds [H···O = 1.79-1.81 Å, O···O = 2.625 (3)-2.648 (3) and O-H···O = 172-176°] into two types of R₂²(8) dimer, only one of which is centrosymmetric. An extensive series of soft hydrogen bonds, of C-H···O and C-H···π(arene) types, links the dimers into a three-dimensional framework. [ABSTRACT FROM AUTHOR]