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Bujak M, Katrusiak A. In-situ pressure crystallization and X-ray diffraction study of 1,1,2,2-tetrachloroethane at 0.5 GPa. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zkri.219.10.669.50821] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
1,1,2,2-Tetrachloroethane, C2H2Cl4 (denoted TCE, m.p. 230 K) has been in-situ pressure crystallized in a Merrill-Bassett diamond-anvil cell, and its structure has been determined at 0.5 GPa and 295 K from the single-crystal X-ray diffraction data. TCE crystallizes in the monoclinic space group P21
/c with the molecules located at the inversion centers. The molecules are in the s-trans conformation, while they assume the gauche conformation in the crystal obtained by cooling. This implies that a phase transition may exist between the low-temperature and high-pressure phases of TCE. In the high-pressure phase the HC–CH moiety of the C2H2Cl4 molecule is disordered in two sites, one related to the other by the non-crystallographic mirror plane approximately through the four Cl atoms of one molecule. The refined occupancy factors for the disordered sites are 0.77 and 0.23. The role played by the Cl…Cl intermolecular interactions for the disorder, and the phase transition between TCE phases built of s-trans (high-pressure) and gauche (low-temperature) molecules have been discussed.
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Shargi S, Webb G, Ando I, Watanabe S. Calculations of solvent effects on 1J(NC) values. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0166-1280(83)80077-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Watanabe S, Ando I, Sakamoto Y. Effect of solvent and internal rotation on 1JCH coupling in isopropylamine and isopropanol. J Mol Struct 1983. [DOI: 10.1016/0022-2860(83)90050-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Solvent effect calculation on the three-bonded fluorine—proton spin-coupling constants (3Jfh) of fluoroethylenes. J Mol Struct 1982. [DOI: 10.1016/0022-2860(82)85111-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Watanabe S, Ando I, Sakamoto Y. Effect of solvent and internal rotation on 1JCH coupling in methylamine and methanol. J Mol Struct 1982. [DOI: 10.1016/0022-2860(82)80038-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Solvent effect calculations on directly bonded 15N-H spin couplings in aniline and 4-nitroaniline. J Mol Struct 1981. [DOI: 10.1016/0022-2860(81)80073-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Watanabe S, Ando I. The Effect of Polar Solvent on the1JCHSpin-Spin Coupling Constants in Halomethanes and Haloethylenes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1981. [DOI: 10.1246/bcsj.54.1241] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ando I, Webb GA. Some quantum chemical aspects of solvent effects on NMR parameters. ACTA ACUST UNITED AC 1981. [DOI: 10.1002/mrc.1270150202] [Citation(s) in RCA: 87] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ando I, Asakura T, Watanabe S. A theoretical study of the dielectric solvent effect on vicinal spin coupling constants. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/0166-1280(81)85116-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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