Studies of Thermal Reactions in the Solid State

Curtin, David Y.; Paul, Iain C.; Duesler, Eileen N.; Lewis, Terry W.; Mann, Barbara J.; Shiau, Wen-I

doi:10.1080/15421407908084412

Cited by 16 publications

(2 citation statements)

References 26 publications

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“…These crystals become opaque, turn golden yellow, and soften when heated to -75°C and -87"C, respectively, presumably as a result of microcrystal formation (16). When cooled to 25OC in a dry atmosphere, they remain golden yellow, but again turn light yellow when exposed to water The X-ray powder patterns of unheated 2 (polymorph 11) and 3 (polymorph I1 of 2 heated to 113OC and cooled) are compared in Fig.…”

Section: Resultsmentioning

confidence: 99%

Binding of water in aqua 18-crown-6 dichloropicric acid complexes in the solid state and its reversible thermal removal

Kolthoff¹,

Chantooni²

1992

Can. J. Chem.

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Can. J. Chem. 70, 177 (1992). Thermogravimetry, differential scanning calorimetry, and FT-IR vibrational spectral studies on the 1 : 1 : 1 18-crown-6:dichloropicric acid:water complex reveal that it remains unaltered when heated to melting. On the other hand, one molecule of water is expelled from the 1 : 2 : 2 complex by heating prior to melting. This results in an ionic microcrystalline product of undetermined crystal structure, in which the conformation of the crown is lower than D,, in symmetry. The enthalpy accompanying this process, which involves rupturing of two water-crown hydrogen bonds, is -44 to -55 kJ mol-I. The original 1 : 2 : 2 complex is regenerated by exposure of the heated adduct to water vapor. It was found that H,O in the structure of the solid 1 : 2: 2 adduct was partially replaced by D,O at room temperature upon exposure to D 2 0 vapor. The crown-H,O OH stretch in the IR exhibits a small or negligible positive isotope effect on deuteration.Key words: crown ether, hydrogen bonding, water, dichloropicric acid.

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Section: Resultsmentioning

confidence: 99%

Binding of water in aqua 18-crown-6 dichloropicric acid complexes in the solid state and its reversible thermal removal

Kolthoff¹,

Chantooni²

1992

Can. J. Chem.

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“…A major focus of interest in solid state chemistry is now the utilization of the crystalline state to lock molecules into orientations favoring a desired reaction. 4 It is possible to design, or preordain or at least modify the reactivity of organic materials, by adjustment of certain crystallographic and topochemical factors.…”

Section: Introductionmentioning

confidence: 99%

Single crystal formation by solid state reaction between 8-hydroxyquinoline and 2,4,5-trichlorophenol

Singh

Srivastava

Fröhlich

2001

J. Chem. Soc., Perkin Trans. 2

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8-Hydroxyquinoline reacts with 2,4,5-trichlorophenol in solution as well as in the solid state forming a 1 : 1 addition compound. In the solid state, reaction proceeds by the diffusion of 8-hydroxyquinoline into the crystal lattice of 2,4,5-trichlorophenol and the reaction product separates in the form of single crystals. The crystal structure of the reaction product has been determined by X-ray diffraction techniques and belongs to a monoclinic system.

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Solid‐state reactions of peroxides

Lazr¹

1983

PATAI'S Chemistry of Functional Groups

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Studies of Thermal Reactions in the Solid State

Cited by 16 publications

References 26 publications

Binding of water in aqua 18-crown-6 dichloropicric acid complexes in the solid state and its reversible thermal removal

Binding of water in aqua 18-crown-6 dichloropicric acid complexes in the solid state and its reversible thermal removal

Single crystal formation by solid state reaction between 8-hydroxyquinoline and 2,4,5-trichlorophenol

Solid‐state reactions of peroxides

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