3404-78-2

Basic information

• Product Name: 2,5-DIMETHYL-2-HEXENE
• Synonyms: 2,5-dimethyl-hex-2-ene;2,5-Dimethylhex-2-ene;2-hexene,2,5-dimethyl-;2,5-DIMETHYL-2-HEXENE 95+%;2,5-DIMETHYL-2-HEXENE
• CAS NO: 3404-78-2
• Molecular Formula: C₈H₁₆
• Molecular Weight: 112.21
• Mol File: 3404-78-2.mol
• Article Data: 11

Chemical Properties

• Melting Point: -103.01°C (estimate)
• Boiling Point: 113 °C
• Flash Point: 11°C(lit.)
• Appearance: /
• Density: 0,72 g/cm3
• Vapor Pressure: 23.7mmHg at 25°C
• Refractive Index: 1.4130-1.4160
• CAS DataBase Reference: 2,5-DIMETHYL-2-HEXENE(CAS DataBase Reference)
• NIST Chemistry Reference: 2,5-DIMETHYL-2-HEXENE(3404-78-2)
• EPA Substance Registry System: 2,5-DIMETHYL-2-HEXENE(3404-78-2)

Safety Data

• Statements: 10
• Safety Statements: 16
• RIDADR: 1216
• HazardClass: 3
• PackingGroup: II
• Hazardous Substances Data: 3404-78-2(Hazardous Substances Data)

Usage

General Description

2,5-DIMETHYL-2-HEXENE is a chemical compound with the molecular formula C8H16. It is a colorless liquid with a sweet, fruity odor, and is classified as an alkene due to the presence of a double bond between two carbon atoms. It is commonly used as an intermediate in the production of various chemical compounds, including fragrances, flavoring agents, and pharmaceuticals. 2,5-DIMETHYL-2-HEXENE is also used as a solvent and in the manufacture of plastics, rubber, and dyes. It is important to handle this chemical with caution, as it may be harmful if inhaled, swallowed, or in contact with the skin, and may also pose a fire hazard.

InChI:InChI=1/C8H16/c1-7(2)5-6-8(3)4/h5,8H,6H2,1-4H3

Upstream product

• 764-13-6 2,5-Dimethyl-2,4-hexadiene 
• 7664-41-7 ammonia 
• 627-58-7 2,5-dimethyl-1,5-hexadiene 
• 19403-24-8 3,3,6,6-tetramethyl-1,2-diazacyclohex-2-ene 
• 73331-62-1 N-(2,2,5,5-tetramethylpyrrolidinyl)nitrene 

Downstream Products

• 592-13-2 2,5-dimethylhexane 
• 692-70-6 (E)-2,5-dimethylhex-3-ene 
• 6975-92-4 2,5-dimethyl-1-hexene 
• 67-64-1 acetone 
• 110-03-2 2,5-dimethyl-2,5-hexanediol 
• 24577-81-9 2,2-dimethyl-3-isobutyl-1,1-dichlorocyclopropane 

Relevant articles and documents

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Dendrimer-Encapsulated Pd Nanoparticles, Immobilized in Silica Pores, as Catalysts for Selective Hydrogenation of Unsaturated Compounds

Heterogeneous Pd-containing nanocatalysts, based on poly (propylene imine) dendrimers immobilized in silica pores and networks, obtained by co-hydrolysis in situ, have been synthesized and examined in the hydrogenation of various unsaturated compounds. The catalyst activity and selectivity were found to strongly depend on the carrier structure as well as on the substrate electron and geometric features. Thus, mesoporous catalyst, synthesized in presence of both polymeric template and tetraethoxysilane, revealed the maximum activity in the hydrogenation of various styrenes, including bulky and rigid stilbene and its isomers, reaching TOF values of about 230000 h?1. Other mesoporous catalyst, synthesized in the presence of polymeric template, but without addition of Si(OEt)4, provided the trans-cyclooctene formation with the selectivity of 90–95 %, appearing as similar to homogeneous dendrimer-based catalysts. Microporous catalyst, obtained only on the presence of Si(OEt)4, while dendrimer molecules acting as both anchored ligands and template, demonstrated the maximum activity in the hydrogenation of terminal linear alkynes and conjugated dienes, reaching TOF values up to 400000 h?1. Herein the total selectivity on alkene in the case of terminal alkynes and conjugated dienes reached 95–99 % even at hydrogen pressure of 30 atm. The catalysts synthesized can be easily isolated from reaction products and recycled without significant loss of activity.

Mesoporous organic Pd-containing catalysts for the selective hydrogenation of conjugated hydrocarbons

Palladium catalysts supported on ordered organic mesoporous polymers were synthesized. The catalysts are characterized by the narrow size distribution of palladium nanoparticles with an average particle size of 2.2-5.2 nm. They demonstrate high catalytic activity and selectivity in phenylacetylene hydrogenation (896-2590 min-1, selectivity 89-98%). High activity and selectivity for alkenes are observed in the hydrogenation of conjugated dienes (for isoprene, TOF = 1850-5000 min-1, selectivity 99%; for 2,5-dimethyl-2,4-hexadiene, TOF = = 1294-2400 min-1, selectivity 100%; for 1,4-diphenyl-1,3-butadiene, TOF = 14-22 min-1, selectivity 7-16%). A dependence of the selectivity on the nature of the support and substrate was found for the hydrogenation of 1,4-diphenyl-1,3-butadiene.