RX_ANS - Halogeno-compounds RX/ALA/P.1 91(II)7(b CH3 CH3 C...

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Halogeno-compounds RX/ALA/P.1 91(II)7.(b) C CH 3 CH CH 3 CH 3 CH 2 ( 1 ) 3,3-dimethylbut-1-ene ( 1 ) 92(II)8.(c) CH 3 CH 2 CH 2 Br OH CH 3 CH 2 CH 2 Br OH CH 3 CH 2 CH 2 OH Br + (2) Energy diagram : PE ( 2 ) Reaction coordinate 94(II)8.(b) (i) e.g. CH 3 CH 2 Br C H H Br CH 3 C H H NC Br CH 3 CH 3 CH 2 CN Br NC + (3) (ii) No. HCN is a weak acid , it only slightly ionizes in water. Therefore, in HCN(aq), [CN (aq)] is low , hence the rate of S N 2 with R–Br is also slow. ( 2 ) 95(II)8.(a) (i) Formula mass of C 4 H 9 Cl = 92.562 Formula mass of NaCN = 49.01 Formula mass of C 4 H 9 CN = 83.132 No. of moles of C 4 H 9 Cl = 562 . 92 3 . 46 = 0.500 (1/2) CH 3 CH 2 CH 2 Br + OH CH 3 CH 2 CH 2 OH + Br transition state
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Halogeno-compounds RX/ALA/P.2 95(II)8.(a) (i) No. of moles of NaCN = 01 . 49 0 . 30 = 0.612 (1/2) Since NaCN is in excess, C 4 H 9 Cl is the limiting reagent No. of moles of C 4 H 9 CN = 132 . 83 2 . 35 = 0.423 (1/2) % yield = 100% 0.500 0.423 100% Cl H C of moles of no. CN
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RX_ANS - Halogeno-compounds RX/ALA/P.1 91(II)7(b CH3 CH3 C...

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