Question

2 Predict the major organic product of each of the following reactions: нон Н3РО4 (a) CH - C— C—CH 3 13 Heat CH3 CH3 CH? OH CH3 H3PO4 (b) CHC-CH CH3 T CH, CH. CH3 Heat Assuming that they both involve El eliminations, show the structures of the carbocations formed as intermediates in each of the above reactions: (a)

Answer 1

2) H3PO4 is strong dehydrating agent and give Alkene. Major product is more substituted Alkene.

a) Major product is :

сH, сн, CH, —С—С—CH, -с- Е (major product)

b) Major product is :

CHз CHз Нас CH3 eda CH3 CS

Carbocation for a) is :

Carbocation in b) is :

Н Н с*. Н- с - с — н с Н Н -с нн с — н Н Scanned with CS CamScanner C-H I-O-I

с*. с — н Н—с- с Н Н -с нн с нн с — н Н Scanned with H CS CamScanner H C-H H I H-C H-O-I