Polymorphism of Bis-β-hydroxyethyl Terephthalate
نویسندگان
چکیده
منابع مشابه
The Sulfonium Salt of Mustard Gas: Bis-β-[bis(β-hydroxyethyl) Sulfonium] Ethylsulfide Dichloride (h·2tdg)
1. The sulfonium salt H.2TDG is formed when H is mixed with even dilute solutions of TDG. Crystalline H.2TDG was isolated from such a reaction mixture. A simple method of preparation of this salt is outlined. 2. A material which differs from H.2TDG in that it hydrolyzes faster, is formed when H hydrolyzes in water. This material is probably H.1TDG but it was not isolated. Approximately 5 to 8 p...
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The asymmetric unit of the title salt, 2C(2)H(8)NO(+)·C(8)H(4)O(4) (2-), comprises one crystallographically independent 2-hy-droxy-ethanaminium cation and one half terephthalate anion. In the crystal, hydrogen bonds involving the hy-droxy and ammonium groups of the cations and the carboxyl-ate O atoms of the terephthalate anions result in the formation of a three-dimensional network structure.
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In the title mol-ecular salt, 2C(6)H(11)NH(3) (+)·C(8)H(4)O(4) (2-), the terephthalate dianion is close to being planar (r.m.s. deviation = 0.049 Å). In the crystal, the cations and anions are linked by N-H⋯O hydrogen bonds into (010) sheets. Of the four terephthalate O atoms, two accept two hydrogen bonds each and two accept one hydrogen bond each.
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In the crystal structure of the title salt, 2C(6)H(9)N(2) (+)·C(8)H(4)O(4) (2-)·4H(2)O, the terephthalate carboxyl-ate groups inter-acts with the 2-amino-4-methyl-pyridinium cations via a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. The water mol-ecules form an R(6) (6)(12) ring motif through O-H⋯O hydrogen bonds and these motifs are fused, forming a supra-molecular chain al...
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The title molecule, C44H30O8, lies about a crystallographic inversion centre located at the centre of the central benzene ring. The benzene rings in the benzoyl and the terephthalate units make dihedral angles of 67.05 (7)° and 57.57 (7)°, respectively, with the naphthalene ring system. There is an intra-molecular C-H⋯O inter-action between the ketonic carbonyl O atom and an H atom on the napht...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1957
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.30.361