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- W2059937977 abstract "The standard (po = 0.1 MPa) molar enthalpies of combustion in oxygen at 298.15 K were measured by static-bomb calorimetry for some quinones and dihydroxyquinones. The standard molar enthalpies of sublimation at 298.15 K were measured by microcalorimetry for 1,4-naphthoquinone and 9,10-phenanthraquinone; values were selected from the literature for the remaining compounds in order to derive the standard molar enthalpies of formation in the gaseous state. −ΔcHmo(cr)(kJ·mol−1)ΔfHmo(g)(kJ·mol−1)1,4-Naphthoquinone4604.1 ± 1.1−97.5 ± 1.99,10-Anthraquinone6464.0 ± 2.1−75.7 ± 2.99,10-Phenanthraquinone6497.8 ± 1.6−49.3 ± 2.81,4,9,10-Anthradiquinone6033.6 ± 2.4−209.0 ± 4.05,8-Dihydroxy-1,4-naphthoquinone4196.8 ± 0.5−499.1 ± 3.21,4-Dihydroxy-9,10-anthraquinone6057.4 ± 1.0−471.7 ± 2.3 The energies of the intramolecular hydrogen bonds in the dihydroxyquinones were assessed as (25 ± 3) kJ·mol−1. 1,4,9,10-Anthradiquinone is apparently considerably strained, and although its reaction with water produces 1,4-dihydroxy-9,10-anthraquinone, a concomitant formation of hydrogen peroxide is shown to be thermodynamically improbable." @default.
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- W2059937977 date "1989-03-01" @default.
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- W2059937977 title "Enthalpies of combustion of 1,4-naphthoquinone, 9,10-anthraquinone, 9,10-phenanthraquinone, 1,4,9,10-anthradiquinone, 5,8-dihydroxy-1,4-naphthoquinone, and 1,4-dihydroxy-9,10-anthraquinone" @default.
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- W2059937977 doi "https://doi.org/10.1016/0021-9614(89)90016-5" @default.
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