| 单词 | rational formula |
| 释义 | > as lemmasrational formula rational formula n. [after German rationelle Formel (1834 in Jahresbericht über die Fortschritte der physischen Wissensch. 13, 186, in a translation of a Swedish text by Berzelius)] Chemistry a chemical formula that gives the number and types of atoms in a compound with an indication of the groups and radicals present (contrasted with empirical formula; cf. also structural formula n. at structural adj. Compounds). ΚΠ 1837 Philos. Trans. (Royal Soc.) 127 51 Quadroxalate of potash... Rational formula... K̇ ĊĊ + ḢĊĊ+ 2(Ḣ ĊĊḢ2). 1871 H. E. Roscoe Lessons Elem. Chem. (new ed.) 295 In order to distinguish between these isomeric bodies, it is necessary to employ rational formulæ, for the purpose of giving an idea of the chemical nature of the substances. 1926 J. Read Text-bk. Org. Chem. iv. 49 Shortened structural formulæ, such as C2H5.COOH..are sometimes called rational formulæ. 1995 Jrnl. Amer. Chem. Soc. 117 1140/1 The rational formula of TiO0.88(OH)2.16(OC4H9)0.08 was suggested from the elemental analysis. < as lemmas |
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