２，６‐ジエチルナフタレンおよび２，６‐ジイソプロピルナフタレンのチオ尿素付加反応：　平衡定数と付加物組成

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タイトル別名
  • Thiourea Adduction of 2,6-Diethylnaphthalene and 2,6-Diisopropylnaphthalene: Equilibrium Constants and Composition of the Adducts.
  • 2 6 ジエチルナフタレン オヨビ 2 6 ジイソプロピルナフタレン ノ チオ

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For the purpose to elucidate the adductibility of 2, 6-diethylnaphthalene (2, 6-DEN) and 2, 6-diisopropylnaphthalene (2, 6-DIPN) with thiourea, equilibrium constants for thiourea adduction of 2, 6-DEN and 2, 6-DIPN were measured at temperatures ranging from 0 to 30°C. Heats of the thiourea adduction and compositions of the relevant adducts were also obtained.<br>The equilibrium constants for the decomposition of thiourea adduct of 2, 6-DEN and 2, 6-DIPN were determined to be 1.56×10-2-5.19×10-2 and 1.36×10-2-6.84× 10-2, respectively. These equilibrium constants are greater than those for urea adduction of hexadecane and less than those for thiourea adduction of isoparaffins and naphthenes. This result suggests that the formation of the adducts of thiourea with 2, 6-DEN and 2, 6-DIPN proceeds advantageously in comparison with the reaction of thiourea with isoparaffins and naphthenes. The thiourea adduction of 2, 6-DEN and 2, 6-DIPN was exothermic and the heats of adduction were observed to be 28 and 37kJ•(mol•2, 6-dialkylnaphthalene)-1, respectively. These values are considerably greater than those of thiourea adducts of isoparaffins and naphthenes, indicating that the stability of 2, 6-dialkylnaphthalene-thiourea adducts is greater than those of other thiourea adducts. Compositions of these adducts, molar ratios of thiourea to 2, 6-dialkylnaphthalene, were determined to be 5.9±0.1.

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  • 石油学会誌

    石油学会誌 38 (6), 447-450, 1995

    公益社団法人 石油学会

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