Organic Chemistry
Organic Chemistry
2nd Edition
ISBN: 9781118452288
Author: David R. Klein
Publisher: WILEY
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Chapter 18, Problem 45PP
Interpretation Introduction

Interpretation: “Diphenyl methane achieve co-planarity in the highest energy conformation” – it should be explained

Concept introduction:

  • For a compound that bears two aromatic rings separated by one carbon atom, the single bond experiences free rotation at room temperature
  • Free rotation of the single bond enables the molecule to adopt different conformations
  • When two rings are co-planar, there is a significant steric interaction between two of the aromatic hydrogen atoms.
  • Steric interaction can be reduce by adopting a conformation in which the two rings are not coplanar

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