19841-74-8

Basic information

• Product Name: 1-ETHYL-1,4-CYCLOHEXADIENE
• Synonyms: 1-ETHYL-1,4-CYCLOHEXADIENE
• CAS NO: 19841-74-8
• Molecular Formula: C₈H₁₂
• Molecular Weight: 108.18
• Mol File: 19841-74-8.mol
• Article Data: 7

Chemical Properties

• Boiling Point: 137.5°Cat760mmHg
• Flash Point: 19°C
• Appearance: /
• Density: 0.841g/cm³
• Vapor Pressure: 8.71mmHg at 25°C
• Refractive Index: 1.474
• CAS DataBase Reference: 1-ETHYL-1,4-CYCLOHEXADIENE(CAS DataBase Reference)
• NIST Chemistry Reference: 1-ETHYL-1,4-CYCLOHEXADIENE(19841-74-8)
• EPA Substance Registry System: 1-ETHYL-1,4-CYCLOHEXADIENE(19841-74-8)

Safety Data

• Hazardous Substances Data: 19841-74-8(Hazardous Substances Data)

Usage

General Description

1-Ethyl-1,4-cyclohexadiene is a chemical compound with the molecular formula C8H12. It is a colorless liquid with a sweet odor and is commonly used as a solvent in various industrial processes. It is flammable and may be harmful if inhaled or ingested, causing irritation to the respiratory system and skin. 1-Ethyl-1,4-cyclohexadiene is also used in the production of other chemicals and pharmaceuticals. It is important to handle this compound with caution and use appropriate safety measures during its handling and storage.

InChI:InChI=1/C8H12/c1-2-8-6-4-3-5-7-8/h3-4,7H,2,5-6H2,1H3

Upstream product

• 100-41-4 ethylbenzene 
• 98-85-1 1-Phenylethanol 
• 100-40-3 4-ethenylcyclohexene 
• 15094-06-1 trans-ethylidenecyclohexene 
• 119146-73-5 7-methyl-trans-bicyclo<4.1.0>hept-3-ene 
• 64-17-5 ethanol 
• 7664-41-7 ammonia 
• 71-43-2 benzene 
• 119-61-9 benzophenone 
• 98-86-2 acetophenone 

Downstream Products

• 16657-86-6 4-Ethyl-4-methoxycyclohex-1-en 
• 3275-00-1 1-methoxy-1-ethylcyclohexane 
• 138714-10-0 trans-1,4-Dimethoxy-1-ethylcyclohexan 
• 100-41-4 ethylbenzene 
• 1498315-14-2 C₈H₁₂O 
• 1498315-15-3 C₈H₁₂O 

Relevant articles and documents

Substituent effects on the dehydration of arene hydrates in aqueous solution

Rate constants have been determined by UV spectrophotometry at 25 °C for the acid-catalyzed dehydration of different types of monocyclic arene hydrates including those substituted at the 1-, 2- or 3-positions. General acid catalysis was not observed, and linear plots of pseudo-first-order rate constants for dehydration against hydronium concentration were obtained. A Hammett plot of the second-order rate constants for acid-catalyzed dehydration, kH (M-1s-1), of unsubstituted- (8a), 3-substituted (8b, 8c, 8d, 8e) and 1-substituted-benzene hydrates (14f and 14h) shows an excellent correlation with σ+ values and yields a large negative ρ-value of -6.5. The results are consistent with rate-determining formation of a benzenium ion in which direct mesomeric interaction with the substituent occurs, presumably permitted by the coplanar arrangement of the diene and carbocation centre in the intermediate. Data points for 2-substituted arene hydrates (13f, 13g, 13h, 13i) deviate negatively from the Hammett plot as direct mesomeric interaction with the substituent is not possible in the corresponding benzenium intermediates. Copyright 2013 John Wiley & Sons, Ltd. A large negative ρ-value of -6.5 is obtained in a correlation of rate constants for the acid-catalyzed dehydration of arene hydrates with σ+ values. Copyright

Relative Thermodynamic Stabilities of 3-Ethylidenecyclohexenes and Isomeric Ethylcyclohexadienes

The relative thermodynamic stabilities of the E and Z forms of 3-ethylidenecyclohexene, 1-ethyl-1,3-cyclohexadiene, 2-ethyl-1,3-cyclohexadiene and 1-ethyl-1,4-cyclohexadiene were determined by t-BuOK catalyzed chemical equilibration in DMSO solution.From the variation of the equilibrium composition with temperature the enthalpy, entropy and Gibbs energy differences between the isomeric species were evaluated.The ethylidenecyclohexenes were found to be the most abundant species at thermodynamic equilibrium, owing to their 9-12 kJ mol-1 lower enthalpy values.The entropy term, however, favors the cyclohexadienes by 7-11 J K-1 mol-1.

Molecules with Twist Bent Bonds. The Synthesis, Properties, and Reactions of trans-Bicyclohept-3-ene and Certain Methylated Derivatives

trans-Bicyclohept-3-ene, 7-methyl-trans-bicyclohept-3-ene, and 7,7-dimethyl-trans-bicyclohept-3-ene have been synthesized.Comparison of their ease of oxidation with the ease of oxidation of the analogous cis-bicyclohept-3-enes has been made.Both the thermal and transition-metal complex promoted rearrangements of the trans-bicyclohept-3-enes have been studied.These systems thermally convert to the cis-bicyclohept-3-enes above 100 deg C and are catalytically rearranged at ambient temperature.Trans to cis isomerization alsooccurs at ambient temperature under photoinduced single electron transfer conditions.