{{short description|1=Hydrocarbon compound ((CH3)3CCH=CH2)}} {{Chembox | ImageFile = 3,3-dimetylo-1-buten.svg | ImageSize = | ImageAlt = | PIN = 3,3-Dimethylbut-1-ene | OtherNames = 3,3-Dimethyl-1-butene |Section1={{Chembox Identifiers | CASNo = 558-37-2 | PubChem = 11210 | ChemSpiderID = 10737 | EC_number = 209-195-9 | UNII = 01ZB73D2KK | InChI=1/C6H12/c1-5-6(2,3)4/h5H,1H2,2-4H | InChIKey = PKXHXOTZMFCXSH-UHFFFAOYSA-N | SMILES = CC(C)(C)C=C }} |Section2={{Chembox Properties | C=6|H=12 | MolarMass = | Appearance = colorless liquid | Density = 0.685 g mL<sup>−1</sup> | MeltingPt = | BoilingPtC = 41 | Solubility = }} |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = }} }}
'''Neohexene''' is the hydrocarbon compound with the chemical formula {{chem2|(CH3)3CCH\dCH2}}. It is a colorless liquid, with properties similar to other hexenes. It is a precursor to commercial synthetic musk perfumes.
==Preparation and reactions== Neohexene is prepared by ethenolysis of diisobutene, an example of a metathesis reaction:<ref name = KO>{{cite encyclopedia|encyclopedia = Kirk-Othmer Encyclopedia of Chemical Technology|first1 = Lionel|last1 = Delaude|first2 = Alfred F.|last2 = Noels|year = 2005|title = Metathesis|doi = 10.1002/0471238961.metanoel.a01|place = Weinheim|publisher = Wiley-VCH | isbn=978-0-471-48494-3 }}</ref>
:(CH<sub>3</sub>)<sub>3</sub>C-CH=C(CH<sub>3</sub>)<sub>2</sub> + {{red|1=CH<sub>2</sub>=CH<sub>2</sub>}} → (CH<sub>3</sub>)<sub>3</sub>C-CH={{red|CH<sub>2</sub>}} + (CH<sub>3</sub>)<sub>2</sub>C={{red|CH<sub>2</sub>}}
It is a building block to synthetic musks by its reaction with ''p''-cymene. It is also used in the industrial preparation of terbinafine.<ref name = KO />
In the study of C-H activation, neohexene is often used as a hydrogen acceptor.<ref>{{cite journal|last1 = Liu|first1 = Fuchen|last2 = Pak|first2 = Esther B.|last3 = Singh|first3 = Bharat|last4 = Jensen|first4 = Craig M.|last5 = Goldman|first5 = Alan S.|title = Dehydrogenation of ''n''-Alkanes Catalyzed by Iridium "Pincer" Complexes: Regioselective Formation of α-Olefins|journal = J. Am. Chem. Soc.|year = 1999|volume = 121|issue = 16|pages = 4086–4087|doi = 10.1021/JA983460P | bibcode=1999JAChS.121.4086L }}</ref>
==References== <references />
Category:Alkenes