| 释义 | triethyl Chem.|traɪˈɛθɪl|
[f. tri- 5 + ethyl.]
a. A formative denoting the presence of three ethyl groups, C2H5, in a compound, as ˌtriethylˈbismuthine, Bi(C2H5)3, triethyl phosphine, P(C2H5)3; see also triethylamine below.
b. spec. denoting the substitution of three ethyl groups for three hydrogen atoms in the substance designated by the rest of the name; e.g. ˌtriethylˈbenzene, C6H3(C2H5)3, in which three ethyl groups take the place of three H atoms in benzene, C6H6; so ˌtriethylˈmethane, CH(C2H5)3 from methane, CH4; ˌtriethylˈcarbinol, C(C2H5)3OH; ˌtriethylˈurea, CONH(C2H5)N(C2H5)2. Also used attrib., as triethyl phosphate, (C2H5)3PO4.
1858Fownes Elem. Chem. (ed. 7) 615 Triethylstibine SbAe3. 1868Watts Dict. Chem. V. 880 Triethylglycerin or Triethylin..is a liquid having a pleasant ethereal odour. 1889Muir & Morley Watts' Dict. Chem. II. 506 Tri-ethyl-phosphine... Colourless mobile liquid. Its odour is very penetrating but not disagreeable.
Hence triethylamine |traɪˈɛθɪləmaɪn|, the tertiary amine of ethyl, N(C2H5)3, in which the three hydrogen atoms of ammonia, NH3, are replaced by three ethyl groups; formerly also called triethyl ammonia and triethylia; trieˈthylic a. = triethyl attrib.
1850Daubeny Atom. The. viii. (ed. 2) 242 Triethylamine, consisting of 3 atoms of ethyle replacing 3 of hydrogen. 1857Miller Elem. Chem. III. 211 Triethylia..is also a soluble, volatile, and powerful base. 1858Fownes Elem. Chem. (ed. 7) 595 Triethylamine, Triethyl-ammonia...is a colourless, powerfully-alkaline liquid, boiling at 91°C. 1873Fownes Chem. 587 Triethylic borate is formed by the action of boron trichloride on alcohol. |
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