Abstract
Dichloromethane, CH2Cl2, has been crystallized in a diamondanvil cell and its structure determined by X-rays at 1.33GPa/293K, and at 1.63GPa/293K. The structures are orthorhombic, space-group Pbcn, and isostructural with the low temperature structure [1]. The Cl Cl intermolecular interactions have been considered as the primary reason for the layer structure of the dichloromethane crystal. The intermolecular distances and molecular geometry of low temperature and high-pressure structures are compared in the Table below. CH2Cl2 at T: 153 K 293 K 293 K P: 0.1 MPa 1.33 GPa 1.63 GPa Ref. [1] This work This work C–H 0.99(13) A 1.01 (9) A 1.13 (12) A C–Cl 1.768(13) A 1.765 (4) A 1.769 (5) A Cl Cl 2.932(4) A 3.360 (3) A 3.324 (5) A Cl–C–Cl 112(1) 111.6(3) 111.4 (4) H–C–H 112(7) 99 (9) 102 (10)
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