4049-81-4

Basic information

• Product Name: 2-METHYL-1,5-HEXADIENE
• Synonyms: 2-METHYL-1,5-HEXADIENE;2-METHYLDIALLYL;SYM-VINYLISOPROPENYLETHANE;2-methyl-hexa-1,5-diene;5-Methyldiallyl;CH2=C(CH3)CH2CH2CH=CH2;-Methyl -1,5-hexadiene;Methylhexadiene
• CAS NO: 4049-81-4
• Molecular Formula: C₇H₁₂
• Molecular Weight: 96.17
• EINECS: 223-751-8
• Mol File: 4049-81-4.mol
• Article Data: 4

Chemical Properties

• Melting Point: -128.8°C
• Boiling Point: 92 °C(lit.)
• Flash Point: 10 °F
• Appearance: /
• Density: 0.712 g/mL at 25 °C(lit.)
• Vapor Density: >1 (vs air)
• Vapor Pressure: 72.9mmHg at 25°C
• Refractive Index: n20/D 1.417(lit.)
• CAS DataBase Reference: 2-METHYL-1,5-HEXADIENE(CAS DataBase Reference)
• NIST Chemistry Reference: 2-METHYL-1,5-HEXADIENE(4049-81-4)
• EPA Substance Registry System: 2-METHYL-1,5-HEXADIENE(4049-81-4)

Safety Data

• Hazard Codes: F,T
• Statements: 11-48/20/21/22-46-45
• Safety Statements: 16-29-33-45-53
• RIDADR: UN 3295 3/PG 2
• WGK Germany: 3
• HazardClass: 3
• PackingGroup: II
• Hazardous Substances Data: 4049-81-4(Hazardous Substances Data)

Usage

General Description

2-Methyl-1,5-hexadiene on mercury-photosensitized irradiation, undergoes internal cycloaddition to afford 1-methylbicyclo[2.1.1]hexane (as major product). High-temperature pyrolysis of 2-methyl-1,5-hexadiene affords 1,5-hexadiene and 2,5-dimethyl-1,5-hexadiene. 2-Methyl-1,5-hexadiene undergoes stereoselective and regioselective reaction with dialkylaluminum chloride (Et2AlCl) and titanium alkoxide [Ti(OPr-i)4, a catalyst] followed by oxidation to afford the corresponding five-membered 3-alkylcycloalkyl methanol. 2-Methyl-1,5-hexadiene is formed as a major product during the condensation reaction between allyl chloride and methallyl chloride in the presence of magnesium.

InChI:InChI=1/C7H12/c1-4-5-6-7(2)3/h4H,1-2,5-6H2,3H3

Upstream product

• 107-05-1 3-chloroprop-1-ene 
• 115-11-7 isobutene 
• 563-47-3 3-Chloro-2-methylpropene 
• 589-09-3 N-allyl-N-phenylamine 
• 106-95-6 allyl bromide 
• 556-56-9 allyl iodid 
• 16744-89-1 2-methylhex-5-en-2-ol 
• 86119-84-8 phosphoric acid 
• 60-29-7 diethyl ether 
• 106578-86-3 2-vinyl-1,1-bis(bromomethyl)cyclopropane 
• 1981-80-2 allyl radical 
• 15157-95-6 2-methylallyl radical 
• 688-61-9 Triallylborane 
• 3100-04-7 Methylcyclopropen 

Downstream Products

• 5212-67-9 6-methyl-hept-6-enoic acid 
• 1974-89-6 6-bromo-2-methyl-1-hexene 
• 28823-41-8 2-methylhexa-2,4-diene 
• 1256481-27-2 1-methoxy-4-(5-methylhex-5-en-1-yl)benzene 
• 1419175-09-9 2,4-difluoro-1-(5-methyl-2-methylenehex-5-enyl)benzene 
• 908592-03-0 C₉H₁₄O₂ 
• 1201909-60-5 1-(2-(2-(but-3-enyl)-2-methylcyclopropylidene)-1-phenylvinyl)benzene 
• 1073808-74-8 1-(4-fluorophenyl)-3-methyl-2-propyl-3-buten-1-one 
• 692-24-0 (E)-2-methyl-3-hexene 
• 7385-82-2 (E)-5-methyl-2-hexene 

Relevant articles and documents

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Cyclopymerization polymers from non-conjugated dienes

Novel homopolymer and copolymer compositions produced from the polymerization of non-conjugated dienes have been discovered. The novel compositions are produced by an equally novel process comprising cyclopolymerization of non-conjugated dienes employing reduced valence state Group VIB metal oxide catalyst on porous support. The preferred catalyst comprises carbon monoxide reduced chromium on silica. Copolymers are formed by copolymerization of non-conjugated dienes with 1-alkenes in contact with the activated chromium on silica catalyst. The compositions are useful as lubricants and additives.

THE REDUCTION OF 2-VINYL-1,1-BIS(BROMOMETHYL)CYCLOPROPANE

A study was carried out on the reduction of 2-vinyl-1,1-bis(bromomethyl)cyclopropane by various methods including electrochemical procedures.The major reaction pathways ential opening and expansion of the cyclopropane ring, while the product of the formation of a second three-membered ring, namely, vinylspiropentane, is formed in low yield.The probable radical mechanism for this reaction is discussed.