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

Electron Charge Density Distribution from X-ray Diffraction Study of the M-Nitrophenol Compound in the Monoclinic Form