ORGANIC CHEM +SG +SAPLING >IP<
ORGANIC CHEM +SG +SAPLING >IP<
6th Edition
ISBN: 9781319171179
Author: LOUDON
Publisher: MAC HIGHER
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Chapter 2, Problem 2.37AP
Interpretation Introduction

(a)

Interpretation:

The potential energy versus dihedral angle for 1, 2-dichloroethane showing maximum and minimum energy with appropriate conformer is to be drawn.

Concept introduction:

Newman projection is a way of representing the groups attached to carbon atoms in the C-C bonds. This is used to determine the interaction between the groups attached to carbon atoms and the dihedral angle. The front carbon atom in the Newman projection is represented by dot and the end on carbon atom is represented by circle. The groups attached to the carbon atoms are then drawn by the line.

The energy of the conformers varies with change in their dihedral angle. The plot of this variation is known as potential energy curve.

Interpretation Introduction

(b)

Interpretation:

The conformer present in highest amount in a sample of 1, 2-dichloroethane is to be stated.

Concept introduction:

Newman projection is a way of representing the groups attached to carbon atoms in the C-C bonds. This is used to determine the interaction between the groups attached to carbon atoms and the dihedral angle. The front carbon atom in the Newman projection is represented by the dot and the end on carbon atom is represented by the circle. The groups attached to the carbon atoms are then drawn by the line.

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Part II. two unbranched ketone have molecular formulla (C8H100). El-ms showed that both of them have a molecular ion peak at m/2 =128. However ketone (A) has a fragment peak at m/2 = 99 and 72 while ketone (B) snowed a fragment peak at m/2 = 113 and 58. 9) Propose the most plausible structures for both ketones b) Explain how you arrived at your conclusion by drawing the Structures of the distinguishing fragments for each ketone, including their fragmentation mechanisms.
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