EBK ORGANIC CHEMISTRY
EBK ORGANIC CHEMISTRY
6th Edition
ISBN: 8220103151757
Author: LOUDON
Publisher: MAC HIGHER
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Chapter 2, Problem 2.4P
Interpretation Introduction

(a)

Interpretation:

The Newmann projection for staggered and eclipsed conformation about the terminal C-C bonds of butane is to be drawn.

Concept introduction:

Newmann 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 Newmann 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.

Interpretation Introduction

(b)

Interpretation:

The potential energy versus dihedral angle for butane showing maximum and minimum energy with one of the conformer is to be drawn.

Concept introduction:

Newmann 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 Newmann 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.

Interpretation Introduction

(c)

Interpretation:

The conformer present in highest amount in a sample of butane is to be stated.

Concept introduction:

Newmann 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 Newmann 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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