Answer Happy

1 (4 points) Draw the resonance structures for the following species. If no resonance structures are present, state so. Show all non-zero formal charges, all lone pairs and multiple bonds (if present). Label the structures as major, minor, or equivalent. a CH3-CH2-CH=CH-CH₂¹- b [CH3CH₂C(O)C(CH3)C(O)CH₂CH3]¹-

3 (3 points) Draw the most stable conformation for cis-1-isopropyl-2-methylcyclohexane and for trans-1-isopropyl-2-methylcyclohexane. Circle the compound that is more stable. Justify your answer. I I A I cis-1-isopropyl-2-methylcyclohexane trans-1-isopropyl-2-methylcyclohexane

1 (3 points) Write a detailed mechanism for the following reaction. Label the initiation, propagation, and termination steps clearly. light (CH3)3CH + Br2 (CH3)3CBr + HBr

2 (3 points) For the following reaction, when the [CH30¹] is doubled and the [(CH3)3CCl] is tripled, the initial rate of the reaction triples. Determine the rate law. Circle the correct answer. (CH3)3CC1 + CH30¹ → (CH3)3COCH3 + C₁¹- A rate = e = kr[CH30¹] B rate = kr[(CH3)3CC1] C rate = kr[(CH3)3CCI][CH30¹] D rate = kr[(CH3)3CCI] [CH30¹1³ E rate = k₁[(CH3)3CC1]³[CH30¹-₁² 3 (2 points) Label each of the hydrogen atoms in the following compound as 1º, 2º, or 3°. You may need to expand the structure. Include the hydrogen atoms attached to the ring carbon atoms. CH3-CH2 CH3-CH H3C