1. How does each of the following changes affect the rate of an E2 reaction? tri

Question

1. How does each of the following changes affect the rate of an E2 reaction? tripling [RX] halving [Base] changing the solvent from CH3OH to DMSO changing the leaving group from I- to Br- changing the base from -OH to H2O changing the alkyl halide from CH3CH2Br to (CH3)2CHBr 2. How does each of the following changes affect the rate of an El reaction? a) doubling [RX] b) doubling[base] c) changing the alkyl halide from (CH3)3CBr to CH3CH2CH2Br d) changing the leaving group from CF to Br e) changing the solvent from DMSO to CH3OH

Explanation / Answer

E2 reaction means rate of reaction

r = Kx [concentration of alkyl halide][ concentration of Base]

a) rate will triple

b) rate will be half

c) rate will increase because polar aprotic is favour for E2

d) rate will decrease

e) rate will decrease

f) rate will decrease

2)

E1 means rate of the reaction depends on only alkyl halide not base

a) double the rate

b) no change

c) rate will decrease

d) rate will increase

e) rate will increase because polar protic solvents are favour for E1

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