10074-43-8

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General Description

Benzene, 1-ethenyl-4-hexyl, is a chemical compound with the molecular formula C18H22. It is a derivative of benzene, with an ethenyl (vinyl) group at the first carbon and a hexyl group at the fourth carbon. Benzene,1-ethenyl-4-hexyl- is commonly used in the production of polymers and plastics, as well as in the manufacturing of adhesives and coatings. It is also a key ingredient in the production of synthetic rubber and other industrial materials. However, exposure to benzene and its derivatives has been linked to health concerns, including an increased risk of cancer and other adverse effects. Therefore, proper handling and protective measures are necessary when working with this chemical.

Upstream product

• 37592-72-6 1-(4-hexyl-phenyl)-ethanone 
• 23703-22-2 1-bromo-4-n-hexylbenzene 
• 7486-35-3 tri-n-butyl(vinyl)tin 
• 1077-16-3 hexylbenzene 
• 116059-93-9 dispiro<2.2.6.2>tetradeca-4,13-diene 
• 100963-63-1 1-(4-hexyl-phenyl)-ethanol 

Relevant academic research and scientific papers

Regio-specific polyacetylenes synthesized from anionic polymerizations of template monomers

Substituted polyacetylenes with alkylphenyl side groups and head-to-head regioregularity were prepared through anionic living polymerization of template monomers and subsequent dehydrogenation process. The template monomers have the structure of 2, 3-disubstituted-1, 3-butadienes prepared by palladium-catalyzed Kumada coupling of the corresponding vinyl bromides. Anionic polymerizations of the template monomers produced narrow disperse substituted polybutadiene precursors with exclusive 1, 4-enchainment. The precursors were converted into soluble polyacetylene derivatives via two methods, e.g., bromination followed by elimination of HBr, and direct dehydrogenation by 2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone (DDQ), both resulting in dark colored products with significant red shift in UV spectra. The obtained head-to-head polyacetylene derivatives exhibited highly thermal stability, possibly due to trans-rich and/or head-to-head chain configurations. The microstructures of the poly(2, 3-dialkylphenyl butadiene) precursors were analyzed in detail using NMR spectroscopy with regard to the solvent effect during polymerization. Block copolymers containing substituted polyacetylene segments were prepared through sequential anionic polymerization of different monomers, followed by dehydrogenation transformation. The present synthesis may serve as a new strategy for tailoring molecular structures of polyacetylene-based polymers by virtue of anionic living polymerization techniques.

Preparation and acid-responsive photophysical properties of T-shaped π-conjugated molecules containing a benzimidazole junction

T-shaped π-conjugated molecules with an N-methyl-benzimidazole junction have been synthesized and their acid-responsive photophysical properties owing to the change in the π-conjugation system are discussed. T-shaped π-conjugated molecules consist of two orthogonal π-conjugated systems including a phenyl thiophene extended from the 2-position and alkyl phenylenes connected through various π-spacers from the 4,7-positions of the N-methyl-benzimidazole junction. The π-spacers, such as thiophene, ethyne, and ethane, have an effect on the acid response of photophysical properties in terms of changes in conformation, excited-state energy and charge-transfer (CT) characteristics. In particular, the π-conjugated molecule with ethynyl spacers exhibited a marked redshift in the fluorescence spectrum with a large Stokes shift upon the addition of acid, whereas the other molecules showed substantial quenching. The redshift in emission was studied in detail by temperature-dependent fluorescence measurements, which indicated the transition to a CT state over the finite activation energy at the excited state. The change in the frontier molecular orbitals upon acid addition was further discussed by means of DFT calculations.

NOVEL METHOD FOR PREPARING STYRENIC OLEFINS

The present invention relates to a method for preparing a styrenic olefin. The method of the present invention comprises the steps of: adding a catalyst and a solvent in a reactor and heating the reactor to create a reflux state; adding an alcohol starting material to the reactor dropwise at a constant rate; removing water generated by adding the alcohol starting material from the reactor; and purifying the obtained styrenic olefin. The method of the present invention is advantageous in minimizing byproducts and preparing styrenic olefins having a variety of substituents in high yield.

Syndiospecific synthesis of longer p-n-alkyl-substituted polystyrenes using monocyclopentadienyl-type titanium catalysts

Substituted styrenes with linear alkyl substituents (C6 to C12) at the para position on the ring were synthesized and polymerized using the (Me)5CpTi(OMe)3/MAO catalytic system. Increased polymerization activiti

FLASH VACUUM THERMOLYSIS OF DISPIROALKADIENES

The Flash Vacuum Thermolysis (FVT) of dispirotetradeca -4,13-diene (7a). dispirotrideca-4,12-diene (7b) and dispirodeca-4,9-diene (7e) at 500-750 deg C is reported.The complicated reaction mixture from 7a and 7b (Scheme 3) included at lower temperatures vinylspiroalkadienes 9, ethylidenespiroalkadiene 10b, β-ethylcycloalkabenzenes 11, while at higher temperatures, p-n-alkyl-(5) and p-sec-alkylstyrenes 14 and p-divinylbenzene (15) dominated.Product formation is explained by invoking diradicals 8,6 and 12 as well as the cyclophanes 1 and 13 as intermediates.For 7e, the product mixture was less complicated and consisted of p-ethylstyrene (5e), 15 and, unexpectedly,p-isopropylstyrene (14e) which contains one carbon more than the starting material.The analysis and interpretation of product formation largely confirms previously suggested reaction pathways and furnishes further interesting details.However, new and unexpected features are also encountered, especially in the fragmentations of 1 and 13 which may stimulate future investigations on the thermal behaviour of these relatively simple hydrocarbons.