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.
| 1902 Jrnl. Chem. Soc. LXXXII. i. 600 Triphenylmethyl... Carbonium Salts. 1905 Ibid. 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]. 1936 Nature 8 Aug. 224/1 Ionic reactions..generally involve carbonium anions and cations. 1962 J. Hine Physical Org. Chem. (ed. 2) vii. 163 The carbonium ion is a very reactive intermediate that is rapidly transformed into the final product. |