1-Phenyl-2-butene has an ultraviolet absorption at λmax=208 nm (ε=8000) . On treatment with a sm

Name: Problem 46, Chapter 24: Chemistry A Molecular Approach
Uploaded: 2020-05-28T21:26:38-08:00
Duration: 2 min 15 s
Channel: Mercedes Mazza
Description: 1-Phenyl-2-butene has an ultraviolet absorption at λmax=208 nm (ε=8000) . On treatment with a small amount of strong acid, isomerization occurs and a new substance with λmax=250 nm(ε=15,800) is formed. Propose a structure for this isomer, and suggest a mechanism for its formation.

step 1 Solving problem 46 of chapter 15. So we have the phenyl 2 butin. So butene is for carbon atoms a

Question

1-Phenyl-2-butene has an ultraviolet absorption at $\lambda_{\max }=208 \mathrm{nm}$ $(\varepsilon=8000) .$ On treatment with a small amount of strong acid, isomerization occurs and a new substance with $\lambda_{\max }=250 \mathrm{nm}(\varepsilon=15,800)$ is formed. Propose a structure for this isomer, and suggest a mechanism for its formation.

   1-Phenyl-2-butene has an ultraviolet absorption at $\lambda_{\max }=208 \mathrm{nm}$ $(\varepsilon=8000) .$ On treatment with a small amount of strong acid, isomerization occurs and a new substance with $\lambda_{\max }=250 \mathrm{nm}(\varepsilon=15,800)$ is formed. Propose a structure for this isomer, and suggest a mechanism for its formation.

Chemistry A Molecular Approach

Nivaldo J. Tro 5th Edition

Chapter 24, Problem 46

Instant Answer

Solved by Expert Mercedes Mazza

05/28/2020

Step 1

1-Phenyl-2-butene is an alkene with a phenyl group attached to the first carbon of the butene chain. The structure can be represented as: C₆H₅-CH=CH-CH₂-CH₃. Show more…

Show all steps

Thanks for your feedback!

1-Phenyl-2-butene has an ultraviolet absorption at $\lambda_{\max }=208 \mathrm{nm}$ $(\varepsilon=8000) .$ On treatment with a small amount of strong acid, isomerization occurs and a new substance with $\lambda_{\max }=250 \mathrm{nm}(\varepsilon=15,800)$ is formed. Propose a structure for this isomer, and suggest a mechanism for its formation.