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, B r in NBs is exchanged by the hydrogen in alkene.

Question

Fill in the blanks by selecting the appropriate term from below: For a process that is non-spontaneous and that favors products at equilibrium, we know that a) ΔrG∘ΔrG∘ _________, b) ΔunivSΔunivS _________, c) ΔsysSΔsysS _________, and d) ΔrH∘ΔrH∘ _________.

Answer 1

Question

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 CH2Cl2 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 CH2Cl2 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 CH2Cl2 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.

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Fill in the blanks by selecting the appropriate term from below: For a process that is non-spontaneous and that favors products at equilibrium, we know that a) ΔrG∘ΔrG∘ _________, b) ΔunivSΔunivS _________, c) ΔsysSΔsysS _________, and d) ΔrH∘ΔrH∘ _________.

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Relative Intensity Part VI. consider the multi-step reaction below for compounds A, B, and C. These compounds were subjected to mass spectrometric analysis and the following spectra for A, B, and C was obtained. Draw the structure of B and C and match all three compounds to the correct spectra. Relative Intensity Relative Intensity 20 NaоH 0103 Br (B) H2504 → (c) (A) 100- MS-NU-0547 80 40 20 31 10 20 100- MS2016-05353CM 80 60 100 MS-NJ-09-3 80 60 40 20 45 J.L 80 S1 84 M+ absent राग 135 137 S2 62 164 166 11 S3 25 50 75 100 125 150 175 m/z