| 释义 |
▪ I. bis-, prefix1
The prec. adv. used in late L., Fr., It., before s, c, or a vowel, in place of bi- prefix2; hence occas. in Eng., as in bisacromial = biacromial, bisalternate alternate in two ways.
Add:2. Chem. Used in the names of compounds to signify two identical groups substituted in the same way.
1931Jrnl. Chem. Soc. i. 1616 The prefixes di-, tri-, tetra-, etc., will be used before simple expressions..and the prefixes bis, tris, tetrakis, etc., before complex expressions. 1974R. S. Cahn Introd. Chem. Nomencl. (ed. 4) iii. 42 Multiplicative prefixes bis-, tris-, tetrakis-, etc. are used in America for all complex expressions. 1975R. F. Brown Org. Chem. iv. 74 If complex substituents enclosed in parentheses are present more than once, we use the special multiplying prefixes of bis, tris, tetrakis, and so on, instead of di, tri, tetra, and so on. 1984Greenwood & Earnshaw Chem. of Elements (1986) viii. 374 Bis (η6-arene) metal complexes have been made for many transition metals by the Al/AlCl3 reduction method.
▪ II. bis-, prefix2 Chem.,
abbreviation of bismuth, used in comb., as bisethyl, C2H5Bi, bistriethyl, etc.
1863Watts Dict. Chem. I. 596. |