Question

ClMe Rank the set of compounds in order of increasing Sn 1 reactivity. (1 = most reactive under SN1 conditions, 4 = least reactive) Structure A: Structure B: Structure C: Structure D:

Answer 1

А в Sud reactivity structure A: [2] structure B [3] Structure : 1 structure D : 4 Srl reaction for tertiary chloride is more faster than the secondary and primary chloride. Because tertiary cation is the most stable than the secondary and primary cation. That's why . Sul reaction of compound (C) is the one fastest . 1. Whereas in case of compound LA) it is secondary and secondary cation is more stable than primary cation but less stable than tertiary cation . so rea Sw1 reactivity of W is greater than . (B) & (D) but less than (@... Не stable tertiary cation (4) Secondary cation

. In case of compound (B) & D both are give primary cation in Sul reaction. So here Sul reactivity depends on the rearring group ability We know that the rate of Sul reaction increases with a good leaving group . This is because the leaving group is invowed in the rate determi- ning step. So a good leaving group easily remove by breaking of c-leaving tond with more faster. So here in (B) the leaving group is-ce whereas in (D) leaving group is -f . so we know that a is a better leaving group than f. So Sul reactivity of (B) in faster . than (D). So the Sna reactivity order is a (0) > (4) ) (B) Yos