Question

Question 1: Use Woodward-Fieser rules to estimate the $LaTeX: \lambda$λmax for the following compound. To enter your answer, type the number and the units (nm). For example, if you felt the answer was 752 nanometers, you would enter 752 nm for the answer.

Question 2: Which of the following best describes the stereochemistry of ring closure and the product for the following reaction?

disrotatory, cis-5,6-diethyl-1,3-cyclohexadiene

conrotatory, cis-5,6-diethyl-1,3-cyclohexadiene

disrotatory, trans-5,6-diethyl-1,3-cyclohexadiene

conrotatory, trans -5,6-diethyl-1,3-cyclohexadiene

Answer 1

Question 1: additional double conjugate Basic system: Conjugated Diene 2mx 217 nm Increments For each additional double conjugate: +30 nm For each alkyl substituent: 5 nm Conjugated Diene 5 alkyl substituents mx 217 nm + 30 nm + 5 ( 5nm) 272 nm