| 单词 | isoprene unit |
| 释义 | > as lemmasisoprene unit isoprene unit n. the arrangement of five carbon atoms found in the isoprene molecule (the single or double nature of the bonds between them being disregarded). ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > isoprenes > isoprene unit isoprene unit1926 1926 C. K. Ingold in Proc. Leeds Philos. & Lit. Soc. (Sci. Sect.) I. 11 It is known..that the carbon skeletons of all terpenes of established constitution can empirically be built up from the skeleton of isoprene, the common product of thermal degradation of almost all terpenes. Divisibility into isoprene units may therefore be regarded as a necessary condition to be satisfied by the structure of any plant-synthesised terpene product. 1942 R. C. Fuson & H. R. Snyder Org. Chem. xxvii. 358 Caoutchouc is composed of the isoprene unit repeated over and over. 1942 R. C. Fuson & H. R. Snyder Org. Chem. xxvii. 358 The occurrence of isoprene units is so general that investigators of the structures of natural products generally consider the most probable formula of an unknown compound to be that which contains the maximum number of isoprene units. 1959 L. Ruzicka in Proc. Chem. Soc. 343/2 Up to 1921, the idea that the higher terpenes are structurally composed of isoprene units was not used as an accepted working hypothesis. 1967 Nature 18 Nov. 642/2 The occurrence of a series of hydrocarbons, with structures based on the C5H8 isoprene unit, has been invoked as evidence for life-forms in Pre-Cambrian times. < as lemmas |
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