691-37-2 Usage
Description
4-Methyl-1-pentene, also known as isopentene, is a colorless liquid with the chemical formula C6H12. It is an alkene hydrocarbon with a linear structure and a methyl group attached to the fourth carbon atom. This organic compound is characterized by its clear colorless appearance and is widely used in various industries due to its versatile properties.
Uses
1. Used in Organic Synthesis:
4-Methyl-1-pentene is used as a monomer in organic synthesis for the production of various chemicals and materials. Its ability to undergo polymerization and copolymerization makes it a valuable component in the creation of different types of polymers.
2. Used in Plastics Industry:
4-Methyl-1-pentene is used as a monomer for olefin polymerization, resulting in the formation of poly(4-methyl-1-pentene). This polymer is known for its excellent chemical resistance, low density, and high transparency, making it suitable for a range of applications in the plastics industry.
3. Used in Automobile Industry:
In the automobile industry, 4-Methyl-1-pentene is utilized as a key component in the production of plastic materials for various automotive components. These components include fuel tanks, air intake manifolds, and other parts that require high chemical resistance and low weight.
4. Used in Electronic Components:
4-Methyl-1-pentene is also used in the manufacturing of electronic components due to its excellent dielectric properties and resistance to chemicals. It is particularly useful in the production of insulating materials and housings for electronic devices.
5. Used in Laboratoryware:
In the field of laboratory research, 4-Methyl-1-pentene is employed in the production of laboratoryware, such as containers and pipettes, that require high chemical resistance and low reactivity with various chemicals.
6. Used in the Production of 1,2-Diiodo-4-Methyl-Pentane:
4-Methyl-1-pentene is also used as a starting material for the synthesis of 1,2-diiodo-4-methyl-pentane, which has applications in the pharmaceutical industry and as a chemical intermediate for further reactions.
Reactivity Profile
The unsaturated aliphatic hydrocarbons, such as 4-Methyl-1-pentene, are generally much more reactive than the alkanes. Strong oxidizers may react vigorously with them. Reducing agents can react exothermically to release gaseous hydrogen. In the presence of various catalysts (such as acids) or initiators, compounds in this class can undergo very exothermic addition polymerization reactions.
Hazard
Same as for 2-methyl-1-pentene.
Health Hazard
Harmful if inhaled or swallowed. Vapor or mist is irritating to the eyes, mucous membrane and upper respiratory tract. Causes skin irritation. Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting.
Fire Hazard
Special Hazards of Combustion Products: Vapors may travel considerable distance to source of ignition and flashback. Container explosion may occur under fire conditions. Forms explosive mixtures in air.
Source
California Phase II reformulated gasoline contained 4-methyl-1-pentene at a
concentration of 300 mg/kg (Schauer et al., 2002).
Environmental fate
Photolytic. Atkinson and Carter (1984) reported a rate constant of 1.06 x 10-16 cm3/molecule?sec
for the reaction of 4-methyl-1-pentene in the atmosphere.
Chemical/Physical. Complete combustion in air yields carbon dioxide and water.
Check Digit Verification of cas no
The CAS Registry Mumber 691-37-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,9 and 1 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 691-37:
(5*6)+(4*9)+(3*1)+(2*3)+(1*7)=82
82 % 10 = 2
So 691-37-2 is a valid CAS Registry Number.
InChI:InChI=1/C6H12/c1-4-5-6(2)3/h4,6H,1,5H2,2-3H3
691-37-2Relevant articles and documents
Merging Halogen-Atom Transfer (XAT) and Cobalt Catalysis to Override E2-Selectivity in the Elimination of Alkyl Halides: A Mild Route towardcontra-Thermodynamic Olefins
Zhao, Huaibo,McMillan, Alastair J.,Constantin, Timothée,Mykura, Rory C.,Juliá, Fabio,Leonori, Daniele
supporting information, p. 14806 - 14813 (2021/09/18)
We report here a mechanistically distinct tactic to carry E2-type eliminations on alkyl halides. This strategy exploits the interplay of α-aminoalkyl radical-mediated halogen-atom transfer (XAT) with desaturative cobalt catalysis. The methodology is high-yielding, tolerates many functionalities, and was used to access industrially relevant materials. In contrast to thermal E2 eliminations where unsymmetrical substrates give regioisomeric mixtures, this approach enables, by fine-tuning of the electronic and steric properties of the cobalt catalyst, to obtain high olefin positional selectivity. This unprecedented mechanistic feature has allowed access tocontra-thermodynamic olefins, elusive by E2 eliminations.
Pyridylamido hafnium complexes with a silylene bridge: Synthesis and olefin polymerization
Canich, Jo Ann M.,Hagadorn, John R.,Kulyabin, Pavel S.,Uborsky, Dmitry V.,Voskoboynikov, Alexander Z.
supporting information, p. 6693 - 6702 (2020/06/08)
The synthesis and characterisation of six novel Cs-symmetric pyridylamido hafnium complexes with a silylene bridge of the type [ArPy(R2Si)NAr′]HfAlk2 are reported. Four complexes have been structurally characterised using single crystal X-ray diffraction. Appreciable differences between the solid state structures of these complexes and the pyridylamido hafnium complexes with a CRR′ bridge were noted. Reactions with B(C6F5)3, [Ph3C][B(C6F5)4] and [HMe2NPh][B(C6F5)4] yielded active catalysts for the homopolymerisations of propene and 1-hexene and ethene/1-octene copolymerization. In spite of the Cs-symmetry of the precatalysts, isotactically enriched polypropylene and poly(1-hexene) were obtained. The fact that the mechanism of the catalyst activation includes the insertion of alkene into the Hf-CAr bond was demonstrated. It was found that the structures of Ar and the R2Si bridge influence the activity, molecular weight capability and 1-octene affinity of the catalysts.
CATALYSTS AND METHODS FOR DIMERIZING PROPYLENE
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Paragraph 0052-0057, (2020/02/06)
Catalysts for producing a branched aliphatic alkene are described. The catalyst can include a catalytic alkali metal or alkali metal composite on a mixed metal oxide support that includes a Column 1 metal and at least one of a Column 3 metal, a Column 4 metal or a lanthanide. The catalyst can have less than 50 wt.% of a metal carbonate. Methods of producing branched aliphatic alkenes by contacting the catalyst of the present invention with an aliphatic alpha olefin are also described.
