pentinenen.
/ˈpɛntᵻniːn/, U.S. /ˈpɛn(t)əˌnin/ Chemistry. Now rare.
Any of a number of unsaturated hydrocarbons having the formula C5H8. Cf. pentyne n.
ΚΠ
1892 H. F. Morley & M. M. P. Muir Watts' Dict. Chem. (rev. ed.) III. 807/1 Pentinenes C5H8. Pentylenes. Pentines.
1904 N.E.D. at Pentane Pentinine.
1911 Proc. Royal Soc. A. 85 p. xviii Two discoveries of unusual interest were made by Greville Williams. One of these was the isolation of the most remarkable of pentinenes, namely, isoprene.
1937 Chem. Rev. 20 135 At the same temperature, but under reduced pressure, a mixture of aluminum and calcium carbides yielded pentinene, whereas polymerized products such as terpenes were obtained at higher pressures.
This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).
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n.1892