| 单词 | dewar benzene |
| 释义 | > as lemmasDewar benzene b. Chemistry. Used attributively with reference to a possible structure (proposed by Dewar) for the benzene molecule in which one bond forms a bridge across the benzene ring; Dewar benzene, the isomer of benzene having a Dewar structure. ΘΚΠ the world > matter > chemistry > organic chemistry > hydrocarbons > [adjective] > benzene > Dewar benzene Dewar1913 the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > benzene > Dewar benzene Dewar benzene1962 1913 J. B. Cohen Org. Chem. Adv. Students II. v. 387 That the parallel double linkage of the Dewar formula is responsible for luminescence..is seen in certain hydropyridine carboxylic esters. 1949 G. W. Wheland Adv. Org. Chem. (ed. 2) x. 420 Approximate calculations have..led to the conclusion that the Dewar structures are of only small (although still far from insignificant) importance in the resonance. 1962 Van Tamelen & Pappas in Jrnl. Amer. Chem. Soc. 84 3790/1 In this contribution we describe a hydrocarbon the properties of which lead us to propose that it is the first isolated member of the ‘Dewar benzene’ class. 1979 Jrnl. Org. Chem. USSR 15 1401 (heading) Calculation of the reaction paths for 1,3-sigmatropic shifts of the C–S bond in allyl hydrosulfide and Dewar thiophene. 1987 Jrnl. Amer. Chem. Soc. 109 7888/1 The high aromatization temperature required for a short-bridged Dewar benzene has precedent. < as lemmas |
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