| 单词 | phosphonic acid |
| 释义 | > as lemmasphosphonic acid phosphonic acid n. any organic acid derived from phosphorous acid (HPO(OH)2); spec. an acid having the formula RPO(OH)2, where R is an alkyl or other organic group. Also: phosphorous acid. ΚΠ 1877 H. Watts Fownes's Man. Elem. Chem. (ed. 12) II. 114 Unsymmetrical phosphorous acid yields acid ethers called phosphonic acids,..which are formed by the action of nitric acid on the primary phosphines. 1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) iv. 118 CH3·PH2, with nitric acid, yields CH3·PO·(OH)2, methyl phosphonic acid. 1950 N. V. Sidgwick Chem. Elements I. 741 By the esterification of ethyl phosphonic acid..an isomeric ester is formed. 1989 R. Dryer & G. Lata Exper. Biochem. i. xi. 292 The first method uses various substituted phosphochloramidates, in which the phosphorus is trivalent since the compounds are derivatives of phosphonic acid. 2000 New Scientist 7 Oct. 7/3 A small dose of alkyl phosphonic acid esters stops the oils foaming and carboxyl-containing polymers stop the mix staining clothes. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。