7. For the following reactions of dienes, please draw the 1,2-product and the 1,4-product. Also, please choose one reaction todraw the reaction mechanisms highlighting how both additionproducts are formed.1.H3C.? . ?CH31,2-Product 1,4-ProductHBr (1 eq)? . ?+ Br2(1 eq.)12-Product 1,4-Product? . ?1,2-Product 1,4-Product+ HBr (1 eq)4.CH2?+ Br2°CH2 (1 eq)12-Product 1,4-Product2

All these are examples of conjugated dienes which are more stable than simple or isolated dienes…

Answered: 1. H3C. CH3 ? ? + 1,2-Product…

1. H3C. CH3 ? ? + 1,2-Product 1,4-Product HBr (1 eq) 2. + Br2 ? ? (1 eq) 12-Product 1,4-Product 3. ? . ? 12-Product 1,4-Product + HBr (1 eq) 4. CH2 ? ? + Br2 °CH2 (1 eq) 12-Product 1,4-Product

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter19: Eas: Electrophilic Aromatic Substitution

Section: Chapter Questions

Problem 3CTQ

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Question

7. For the following reactions of dienes, please draw the 1,2-
product and the 1,4-product. Also, please choose one reaction to
draw the reaction mechanisms highlighting how both addition
products are formed.
1.
H3C.
? . ?
CH3
1,2-Product 1,4-Product
HBr (1 eq)
? . ?
+ Br2
(1 eq.)
12-Product 1,4-Product
? . ?
1,2-Product 1,4-Product
+ HBr (1 eq)
4.
CH2
?
+ Br2
°CH2 (1 eq)
12-Product 1,4-Product
2

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