allene

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allene

[‚a′lēn]
(organic chemistry)
C3H4 An unsaturated aliphatic hydrocarbon with two double bonds. Also known as propadiene.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Cycloaddition of thiophene S-oxides to allenes, alkynes and to benzyne, New Journal of Chemistry, 27: 1377-1384.
These heavy allenes are all thermally stable and stored under inert atmosphere but their structural characteristics are remarkably different from those of carbon allenes that have a rigid linear C -C-C skeleton and two orthogonal C-C [pi] bonds.
The intense absorption near 2360 [cm.sup.-1] can be assigned to alkynes carbon triple bond stretching vibration, with possible contribution from C=C=C bond stretching vibration of allenes [13].
Papers discuss bite angle effects of diphosphines in carbonylation reactions, reactivity of pincer complexes toward carbon monoxide, enantioselective carbonylation reactions, microwave-promoted carbonylations, recent advances in two-phase carbonylation, catalytic carbonylations in ionic liquids, carbonylation of alkenes and dienes, recent developments in alkyne carbonylation, carbonylation of allenes, homogenous carbonylation reactions in the synthesis of compounds of pharmaceutical importance, and palladium-assisted synthesis of heterocycles via carbonylation reactions.
[beta]-Keto sulfones are versatile synthetic intermediates used for the preparation of diverse classes of organic compounds such as substituted acetylenes, olefins, allenes, vinyles, and pyrans.