Résumé:
At room temperature, the m-Nitrophenol (m-NPH) appears in two polymorphic
structures: orthorhombic and monoclinic forms. In the present work, we shall focus on the
monoclinic form of this compound which has a centrosymmetric structure with the space
group P21/n. The molecular dipole moment has been estimated experimentally. High
resolution single crystal diffraction experiment was performed at low temperature with
MoKa radiation. The crystal structure was refined using the multipolar model of Hansen and
Coppens (1978). The molecular electron charge density distribution is described accurately.
The study reveals the nature of inter-molecular interactions including charge transfer and
hydrogen bonds. In this crystal, hydrogen bonds of moderate strength occur between the
hydroxyl group and the O atom in the nitro one.
