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Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
Published on: August 18, 2017
Competing patterns of weak directional forces in pressure-frozen CH2ClI and CH2I2
Marcin Podsiadło1, Andrzej Katrusiak
1Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland.
Abstract:
Isostructural relations and phase transitions of dihalomethanes have been rationalized by the competing patterns of CH...halogen hydrogen bonds and halogen...halogen interactions, the common weak directional interactions in soft organic matter. Pressure-frozen chloroiodomethane, CH(2)ClI, at 295 K and 0.72 GPa forms centrosymmetric phase III, which at ca. 400 K and 1.6 GPa disproportionates into CH(2)Cl(2) and CH(2)I(2). The directional character of intermolecular contacts between halogen atoms results from the characteristic anisotropic charge distribution on molecular surface.
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