Abstract

The paper summarizes experimental X-ray diffraction and IR-spectroscopic data on the effect of pressure on a number of molecular and ionic-molecular crystals: monoclinic (I) and orthorhombic (II) polymorphs of paracetamol, fenacetin, monoclinic (α) and trigonal (γ) polymorphs of glycine, p-benzoquinone, Co(III)-nitro- and nitrito-pentaammine complexes, and sodium oxalate. Special attention is paid to the role of intermolecular interactions, in particular hydrogen bonds, in the anisotropy of structural distortion. For several compounds, the distortions induced by high-pressure and low-temperature are compared.

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