Which of the following bases works best to maximize the E2 product in the reacti

Question

Which of the following bases works best to maximize the E2 product in the reaction shown below? (CH_3)_2CHCH_2CH_2CH_2CH_2Br _ base rightarrow (CH_3)_2CHCH_2CH=CH_2 A) KOCH_2CH_3 B) NaOCH_2CH_3 C) NaOC(H_2CH_3)_3 D) NaOH Which of the following does not correctly describe S_N2 reaction of alkyl halides? A) The transition state species has a pentavalent carbon atom. B) Rate of reaction depends on the concentration of both the alkyl halide and the nucleophile. C) Tertiary halides react faster than secondary halides. D) The mechanism consists of a single step with no intermediates. Starting with 1-hexene (CH_2CH(CH_2)_3CH_3], which synthetic sequence below gives 2-cyanohexane [CH_3CHCN(CH_2)_3CH_3]? A) (1) H_2SO_4 (cat.). H_2O (2) NaCN B) (1)Br_2, H2O (2) NaCN C) (1) HBr/peroxide (2) NaCN D) (1) HBr (2)NaCN What is major product in the following reaction?

Explanation / Answer

27 FASTEST SN2 WIIL BE IM METHYL BROMIDE 28 D WILL BE CORRECT DUE TO LESS SIZE AND MORE PKA VALUE 29 C 31 C WIIL BE PRODUCT

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