| 释义 |
cyclopentadiene, n. Chem.
Brit. |ˌsʌɪkləʊpɛntəˈdʌɪiːn|, U.S. |ˈsaɪkloʊˌpɛn(t)əˈdaɪˌin|
[‹ cyclo- comb. form + penta- comb. form + di- prefix1 + -ene comb. form, after German Cyclopentadiën (G. Kraemer & A. Spilker 1896, in Berichte der Deutsch. chem. Ges. 29 554).]
A liquid unsaturated cyclic hydrocarbon, C5H6, that is formed as a by-product of the cracking of petroleum, readily reacts to produce a solid dimer, and is used in the manufacture of synthetic resins and in organic syntheses. Also: a substituted derivative of this compound.
Cf. cyclopentadienyl n. Unlike the cyclopentadienyl anion, the cyclopentadiene molecule is non-planar and not aromatic.
1896Jrnl. Chem. Soc. 70 i. 289 The authors refer to it as the cyclopentadiene of coal tar. 1922J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xxxiii. 541 Although the five-membered heterocyclic unsaturated compounds resemble benzene, the unsaturated carbocyclic compound cyclopentadiene does not. 1959E. P. Stevenson in H. Jarrett Sci. & Resources iv. 126 A new fuel additive, not yet ready for commercial use, is based on manganese and cyclopentadiene. 1992Chemosphere 24 525 The organic compounds identified from the thermal decomposition of 1,2-dichlorobenzene were unsaturated chlorinated aliphatic hydrocarbons, chlorinated cyclopentadienes, [etc.]. |