| 释义 |
trichlor-, trichloro- Chem.|traɪˈklɔər(əʊ)|
[f. tri- 5 c + chloro-.]
A formative analogous to tribromo-, expressing the substitution of three atoms of chlorine for hydrogen, as in trichlorobenzene, C6H3Cl3; so trichloracetic acid, CCl3.CO2H, etc. Also triˌchloro-, ˌtrichloracetˈaldehyde = chloral.
1845Hofmann in Mem. & Proc. Chem. Soc. II. 286 Trichloraniline..C12H4Cl3N..procured..by the direct action of chlorine on aniline or the chlorinated base. 1876Harley Royle's Mat. Med. 339 The aldehyde thus formed is immediately attacked by the chlorine and converted into hydrochloric acid and trichloraldehyde or chloral. 1912Thorpe Dict. Appl. Chem. II. 44 Chloroform, Trichloromethane CHCl3..was discovered by Liebig in 1831. 1921J. S. Chamberlain Textbk. Org. Chem. 226 The tri-chlor acet-aldehyde then reacts with an alkali present yielding chloroform. 1964N. G. Clark Mod. Org. Chem. x. 189 Acetaldehyde..may be chlorinated to chloral (trichloroacetaldehyde..), an important intermediate in the manufacture of ‘D.D.T.’.
Add: Before a vowel, trichlor-. ˌtrichloroˈphenol [ad. G. Trichlorphenol (A. Faust 1867, in Zeitschr. f. Chem. III. 729)], any of six chlorinated derivatives of phenol having the formula C6H2Cl3(OH) , used as fungicidal and preservative agents and in the manufacture of various pesticides.
1871Jrnl. Chem. Soc. IX. 1121 Faust obtained this compound [sc. dichloroquinone] by oxidation of *trichlorophenol by nitric acid. 1919Jrnl. Amer. Chem. Soc. XLI. 2032 Phenol sulfonic acid on treatment with chlorine forms 2,4,6-trichlorophenol, the sulfonic groups being detached. This 2,4,6-trichlorophenol is also formed by passing chlorine into phenol. 1941Proc. Soc. Exper. Biol. & Med. XLVII. 389 In the case of 2,4,6-trichlorophenol it is possible to get an estimate of the relative germicidal strength of the undissociated compound as compared with the phenolate. 1979E. R. Freiter in Encycl. Chem. Technol. (ed. 3) V. 870 If one starts with 2,4,5-trichlorophenol, the corresponding dioxin formed is the very toxic 2,3,7,8-tetrachlorodibenzo-p-dioxin. |