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November 18, 2005 Thyoa souri wintial attack by a chlorine atom Gsmutin ofan-propyl cation Name Multiple Choice (3 points each) Chemistry 2113 I. Markovnikov addition of HCI to aT initial attack by a chlorine ion, c isomerization of 1-chloropropane er formation of an isopropyl cation. Propene inalwes 2 In the following reaction, doubling the indide conantration will have what effeect on the rate of the reaction? (CH3)3CBr I a) no change b) doubles the rate c) halves the rate (CH3)yCI+ Br d) quadruples the rate (4) 2. What are the predicted shape and bond angles anund the central C atom in (CH:)aC+? a) trigonal planar, 120° b) trigonal pyramid, 109.5 c) trigonal planar, 109.5° d) trigonal pyramid, 120 3Which alcohol would be most easily dehvdratnd Titary но OH он он он IV (51) 4. Predict the major product in each of the following reactions CH, + HCI a) 1

Answer 1

Norwer 18. Os Name a sou Multiple Choice (points each) I. Maurkovnikov addition of HCl to proper initial attack by a chlorine on e) somerization of 1-chloropropane e formation of an isopropyl aallon forms more stable isopropylcarbocation which is a secondary cation OPTIONE by a chlorina rayonuyla 2. In the following reaction, doubling the the rate of the reaction? r e will have whar effect on Con hodie This is SN1 so no effect of nudeophile on rate of rxn. OPTION A (CH3)3CBr+r (CH3)3CI+ Br a) no change b) doubles the rate c) hallves the rate d) quadruples the rate (4) 2. What are the predicted shape and bond angles trigonal planar, 120° b) trigonal pyramid, 109.5 c) trigonal planar, 109.5° d) trigonal pyramid, 120 les avand the central Catonin (CH),C? a) a carbocation is trigonal planar with sp2 hybridizaton, bond angle 120. OPTION A 3. Which alcohol would be most casily dehydrated Tento OH OH III, a tertiary alcohol is most readily dehydrated to give a more substituted alkene. (51) 4. Predict the major product in each of the following reactions: reactions: CHE ai + HCI