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organic compounds
Crystals of molecular complexes of dimethyl sulfoxide with trichloromethane (chloroform), (CH3)2SO·2CHCl3, (I), and dichloromethane, (CH3)2SO·CH2Cl2, (II), have been grown in situ. In both compounds, the components are linked together by (Cl)C—H
O interactions. The dimethyl sulfoxide molecules in (I) are bound into chains by C—HO interactions. In (II), pairs of the components form centrosymmetric rings, linked into a three-dimensional network by C—HO contacts and dipole–dipole interactions between dimethyl sulfoxide molecules.
O interactions. The dimethyl sulfoxide molecules in (I) are bound into chains by C—HO interactions. In (II), pairs of the components form centrosymmetric rings, linked into a three-dimensional network by C—HO contacts and dipole–dipole interactions between dimethyl sulfoxide molecules.organic compounds
At ambient temperature, the title compound, C16H14O3, is triclinic, with the n-butyl side chain disordered in an out-of-plane orientation. On cooling below 240 K, it converts into a different triclinic phase with an ordered planar conformation and denser packing, which is retained on warming to room temperature. The transition (occasionally) proceeds from single crystal to single crystal.
