Most stable conformer should be found between the given two chair conformations. Concept introduction: Chair conformer: chair conformer is a stable conformer for cyclohexane compound. In this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring. Example: Newman projection: Newman projection of molecule is one type of representations for the alkanes , where the projection visualization from one carbon to another carbon. In this Newman projection, front carbon which represented with dot is called proximal and the back carbon which represented with circle is called distal. The most stable conformation in the Newman projection is the one which has least steric hindrance among all conformations.

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Chapter 4, Problem 68IP

(a)

Interpretation Introduction

Interpretation:

Most stable conformer should be found between the given two chair conformations.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. In this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.
Example:

Newman projection: Newman projection of molecule is one type of representations for the alkanes, where the projection visualization from one carbon to another carbon. In this Newman projection, front carbon which represented with dot is called proximal and the back carbon which represented with circle is called distal.

The most stable conformation in the Newman projection is the one which has least steric hindrance among all conformations.

(b)

Interpretation Introduction

Interpretation:

The isomer is needed to be found which cannot perform ring flip.

Concept introduction:

Chair conformer: chair conformer is a stable conformer for cyclohexane compound. In this chair conformer two positions are important for substitutions one is equatorial and other one axial position. Axial positions are parallel to the axis of ring while equatorial positions are perpendicular to the axis of the ring.
Example:

Newman projection: Newman projection of molecule is one type of representations for the alkanes, where the projection visualization from one carbon to another carbon. In this Newman projection, front carbon which represented with dot is called proximal and the back carbon which represented with circle is called distal.

The most stable conformation in the Newman projection is the one which has least steric hindrance among all conformations.

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