17829-37-7

Basic information

• Product Name: pent-1-en-3-yl
• Synonyms: 1-Penten-3-yl radical
• CAS NO: 17829-37-7
• Molecular Formula: C₅H₉
• Molecular Weight: 69.125
• Mol File: 17829-37-7.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: pent-1-en-3-yl(CAS DataBase Reference)
• NIST Chemistry Reference: pent-1-en-3-yl(17829-37-7)
• EPA Substance Registry System: pent-1-en-3-yl(17829-37-7)

Safety Data

• Hazardous Substances Data: 17829-37-7(Hazardous Substances Data)

Upstream product

• 31844-95-8 2-bromopent-1-ene 
• 60468-23-7 (E)/(Z)-1-bromo-1-pentene 

Downstream Products

• 1574-41-0 Z-piperylene 
• 2004-70-8 1-methylbuta-1,3-diene 

Relevant articles and documents

Eleven Stable C5H9(+) Cations in the Gas Phase. On the Dissociative Ionization of 31 Isomeric C5H9Br Compounds

Collisional activation mass spectrometry (CA) reveals the existence of 11 stable C5H9+ cations in the gas phase, e.g. the substituted allyl cations a, b, c, d, and e, the substituted vinyl cations f, g, h, and i, the methyl cyclobutyl cation j and the cyclopentyl cation k, respectively.The ethyl substituted allyl cation a is formed via dissociative ionization of the isomeric precursors 1, 3, 4, 5, 18, 19, 20, 22, and 28 by means of various mechanistic processes, whereas the 1,3-dimethylallyl cation b is generated from both 2 (by allylic cleavage) and in part from the stereoisomeric cyclopropan derivatives 25, 26 and 27. 6 gives a mixture of the vinyl cations f and g.From 13 and 14 the main product generated is the 1,2-dimethylallyl cation d, which is formed directly from 11 and also by quite complicated processes from 13, 14 and to a certain extent from 25, 26 and 27.The dissociative ionization of 9, 15, 16, 21, 24 and (in part) 23 give rise to the formation of the substituted vinyl cation h.Decomposition of 23 results not only in formation of h but generates also the 1,1-dimethylallyl cation e.From 29 and 30 both the methylcyclobutyl cation j and cyclopentyl cation k are produced, whereas the isomeric precursor 28 gives mainly the substituted allyl cation a and a second, as yet, unidentified C5H9(+) cation.In general, it can be stated that the gas phase chemistry of cation radicals of substituted cyclopropanes is characterised by multistep-reactions, commencing with spontaneous ring opening.The so formed intermediates undergo various rearrangements (including hydrogen and alkyl shifts) prior to expulsion of Br.Direct elimination of Br from intact cyclopropan-like structures, followed by ring opening of the intermediate cyclopropyl cation, cannot compete with the above-mentioned multistep-sequences. - Keywords: Isolated Carbocations, Ion Structures, Gas Phase Ion Chemistry, Mass Spectrometry, Collisional Activation