Question

1. arrange Alkyl bromides in theoretical order of reactivity in SN1 reaction

2. arrange Alkyl bromides in theoretical order of reactivity in SN2 reaction

AgNO3+ Ethanol Yal H₂C (SN 1) 1-Chlorobutane Nal + Acetone SN2 CH3 H3C 2-Chlorobutane Br CH3 H3C 2-Bromobutane CH3 H2C- a CH3 t-butylchloride Benzylchloride Br Bromobenzene

Answer 1

reactivity of SN1 reaction is - CH₂ BP a a) et feljelly Lello) eriz i eltz) eta na) El Be 3. Bunu SO, SN1 reaction depends on the stani of the carbocation formed. More stable the cation higher SNl reaction happened . (A) benzyl cation more stable by resonance CH3 CH₂ the o tertiary eation less Stable than benzyleation ACHE

- ① and ② form same 2° cation @ but Bp is to better leaving group than -el. .: SO, 394. So, z cation (②) more stable than 2 cation. (3 and Ⓡ) So, 1273) 4. 6 form iocation than ③. ~ € so, less stable

o does not give SNl reaction. D o not stable as cation on sp2.carbon. So, the order is 1293) 4) 5)6 2) SN 2 reaction order is, Chorse Trajetty aj me dety) Bp CAD reaetive sive better with Primary halides .. as stepie hindrance at back side is less .

o sive better Sna tham ② (both are primary halides) as in ift transition state is Stabilized by T electrons of benzene ring. So o react first ® and a secondary halides; react less than ③ as back side is sterie bulk Present.. -Br is to better leaving group than el so, i 4 So, 1)2) 374. . 6 is tertiary halide does not live Sna as back I side filly hindered. : a Br is not give SN? as T electrons. repel nue to attack So, 576 (1-elletrons dominated) So, 12) 374) 576.