单词 | paranaphthalene |
释义 | paranaphthalenen. Chemistry. Now historical and rare. An aromatic hydrocarbon discovered in coal tar, now called anthracene. ΘΚΠ the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > polynuclear aromatic hydrocarbons green oil1607 paranaphthalene1838 anthracene1840 oxanthracene1862 chrysene1864 cerulein1866 acenaphthene1868 naphthoquinone1870 anthracene oil1873 azulene1874 acenaphthylene1875 ionene1894 1838 T. Thomson Chem. Org. Bodies 746 This substance was discovered by M. Dumas in 1832, in coal tar, and named by him paranaphthalin, because from his experiments it appears in its composition to be perfectly identical with naphthalin. c1865 H. Letheby in J. Wylde Circle of Sci. I. 107/1 Finally, a more solid material, named paranaphthaline, distils over. 1874 Index Jrnl. Chem. Soc. 208/2 Paranaphthalene, constitution of. 1993 Chem. Rev. 93 164/1 Fritzsche..was aware of ‘paranaphthaline’, melting around 180°C, which Dumas and Laurent in 1832 had isolated from coal tar. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < |
随便看 |
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。