2-METHYL-1,5-HEXADIENE Chemical Properties

Melting point:

-128.8°C

Boiling point:

92 °C(lit.)

Density 

0.712 g/mL at 25 °C(lit.)

vapor density 

>1 (vs air)

refractive index 

n20/D 1.417(lit.)

Flash point:

10 °F

form 

clear liquid

color 

Colorless to Almost colorless

CAS DataBase Reference

4049-81-4

Safety Information

Hazard Codes 

F,T

Risk Statements 

11-48/20/21/22-46-45

Safety Statements 

16-29-33-45-53

RIDADR 

UN 3295 3/PG 2

WGK Germany 

3

HS Code 

2901.29.5000

HazardClass 

3

PackingGroup 

II

MSDS

• Language:English Provider:SigmaAldrich

2-METHYL-1,5-HEXADIENE Usage And Synthesis

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.

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