18. Predict the two most likely mechanisms for the reaction of 2-iodohexane with sodium ethoxide.(A)SN2 and SN1 (B) E1 and E2 (C) SN2 and E2(D) E1 and SN1 (E) E2 and SN1

7. Predict the specific rotation of the compound shown.(A) It is impossible to predict; it must be determined experimentally.(B) Because both asymmetric centers are R, the compound is dextrorotatory.(C) Because both asymmetric centers are S, the compound is dextrorotatory.(D) Zero; the compound is achiral.(E) Because this compound represents a racemic mixture, the compound is dextrorotatory.

18. Predict the two most likely mechanisms for the reaction of 2-iodohexane with sodium ethoxide.
(A)S_N2 and S_N1
(B) E1 and E2
(C) S_N2 and E2
(D) E1 and S_N1
(E) E2 and S_N1

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