Question

28. Which statement best describes the mechanism of the S2 reaction? (a) back-side attack with inversion of configuration (b) front-side attack with retention of configuration (c) front-side attack with inversion of configuration (d) front- and back-side attack with racemization (@) back-side attack with retention of configuration . Under Sn2 reaction conditions, what product will be formed in the nucleophilic substitution of bromine by methoxide in cis-1- bromo-4-methylcyclohexane? (a) axial, axial trans-1-methoxy-4-methylcyclohexane (b) equatorial, equatorial cis-1-methoxy-4-methylcyclohexane (©) equatorial, equatorial trans-1-methoxy-4-methylcyclohexane (d) axial, equatorial cis-1-methoxy-4-methylcyclohexane Why do some Spl reactions produce a bit more of the inverted product than of the product with retention? (a) Reaction occurs with the free carbocation. (b) Reaction occurs in the intimate ion pair, and the leaving group shields one side a bit while the other side is open for attack (C) The solvent-separated ion pair would give extra product with retention (d) Reaction occurs by way of inversion, and the product formed with retention comes from racemization of the product after the Snl reaction.

Answer 1

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