| 释义 |
carbonium Chem.|kɑːˈbəʊnɪəm|
[f. carbo- + -onium as in ammonium.]
(a) Formerly, ‘the univalent radical CH3 in the capacity..of a base former analogous to ammonium’ (Webster 1909); (b) used attrib. of an organic ion containing positively charged carbon. Cf. carbanion.
1902Jrnl. Chem. Soc. LXXXII. i. 600 Triphenylmethyl... Carbonium Salts. 1905Ibid. LXXXVIII. i. 282 Distinction is drawn between an ionisable and a non-ionisable valency; the former is termed a ‘carbonium valency’. Ibid. 282 Carboxonium salts..are regarded as carbonium salts, corresponding with the salts of triphenylmethyl. 1933[see carbanion]. 1936Nature 8 Aug. 224/1 Ionic reactions..generally involve carbonium anions and cations. 1962J. Hine Physical Org. Chem. (ed. 2) vii. 163 The carbonium ion is a very reactive intermediate that is rapidly transformed into the final product. |