allylene Chem.
(ˈælɪliːn)
[f. allyl + -ene.]
A divalent hydro-carbon radical, C3H4, isomeric with acetylene; consisting of allyl minus one atom of hydrogen. Also called propine.
| 1863 Watts Dict. Chem. I. 112 Pure allylene, a colourless gas, having an unpleasant odour, burning with a smoky flame. 1869 Roscoe Elem. Chem. 391 Allylene is formed by the action of potash upon propylene dichloride. |
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Substitute for etymology and def: [ad. Fr. allylène (coined by M. Berthelot in Chimie Organique (1860) II. iii. i. 160 ): see allyl n., -ene.]
1. = propyne n.
| 1862 Miller Elem. Chem. III. (ed. 2) iii. § vi. 243 The representative of this class of hydrocarbons is acetylene, but a second ( C6H4 ), allylene, has lately been announced. 1921 Jrnl. Amer. Chem. Soc. XLIII. 1227 The disappearance of the blue color shows the formation of sodium acetylide; subsequent addition of methyl iodide brings about the formation of allylene. 1965 Phillips & Williams Inorg. Chem. I. xvii. 612 A magnesium carbide Mg2C3 is said to give largely allylene..on hydrolysis, suggesting that its lattice contains C 4- / 3 units. |
† 2. = *propadiene n. Cf. *allene n. 1. Obs. exc. Hist.
| [1872 Jrnl. Chem. Soc. XXV. 144 The authors hope to obtain different allylenes, whereof theoretically at least, three isomeric forms are possible.] 1889 Jrnl. Chem. Soc. LVI. Abstracts 840 The author's attempts to prepare allylene, CH2:C:CH2 ..were unsuccessful. 1968 A. A. Baker Unsaturation in Org. Chem. vii. 88 For a number of years there was a great deal of confusion surrounding the name allylene. Some chemists used it..in describing propadiene, but others used it synonymously with propyne and were convinced that propadiene, which they called allene, did not exist. |