Chapter 8, Problem 8.26P

(a)

Interpretation Introduction

Interpretation:

Structural formua of the product formed when each alkene is treated with one equivalent of NBS in $C{H}_{2}C{l}_2$ in presence of light has to be drawn.

Concept introduction:

Bromine does not act as good source for free radical bromination on allylic C-H bonds since it will simply add to the alkene.

• • NBS: N-bromosuccinimide: using NBS with low concentration of Bromine molecule, that catalyzed by HBr leads to th eproduct.
• • Allylic susbstitution using NBS involves a net double substitution i.e, $Br$ in NBs is exchanged by the hydrogen in alkene.

(b)

Interpretation Introduction

Interpretation:

Structural formua of the product formed when each alkene is treated with one equivalent of NBS in $C{H}_{2}C{l}_2$ in presence of light has to be drawn.

Concept introduction:

Bromine does not act as good source for free radical bromination on allylic C-H bonds since it will simply add to the alkene.

• • NBS: N-bromosuccinimide: using NBS with low concentration of Bromine molecule, that catalyzed by HBr leads to th eproduct.
• • Allylic susbstitution using NBS involves a net double substitution i.e, $Br$ in NBs is exchanged by the hydrogen in alkene.

(c)

Interpretation Introduction

Interpretation:

Structural formua of the product formed when each alkene is treated with one equivalent of NBS in $C{H}_{2}C{l}_2$ in presence of light has to be drawn.

Concept introduction:

Bromine does not act as good source for free radical bromination on allylic C-H bonds since it will simply add to the alkene.

• • NBS: N-bromosuccinimide: using NBS with low concentration of Bromine molecule, that catalyzed by HBr leads to th eproduct.
• • Allylic susbstitution using NBS involves a net double substitution i.e, $Br$ in NBs is exchanged by the hydrogen in alkene.