| 释义 |
onium, a. Chem.|ˈəʊnɪəm|
Also 'onium.
[f. prec.]
Applied to (compounds containing) ions of the kind named in -onium.
1905Jrnl. Chem. Soc. LXXXVIII. i. 281 Carbon differs from other elements, which form ‘onium’ bases, in that it forms salts only. 1923G. N. Lewis Valence ix. 108 The formation of the typical ‘onium’ ion is a process which differs in no essential respect from the other processes in which hydrogen or other radicals become attached to lone pairs. 1952Kirk & Othmer Encycl. Chem. Technol. IX. 596 Several important classes of dyes, for example the cyanine dyes.., the azine dyes.., and the amino-substituted triphenylmethane dyes.., are onium compounds. 1953C. K. Ingold Struct. & Mech. Org. Chem. v. 208 It is not necessary that the anion of the 'onium salt should be the substituting agent. 1973J. F. Willems in R. J. Cox Proc. Symposium Photogr. Processing Univ. Sussex 227 Various onium compounds considerably accelerate the bleaching out of the silver. |