Chair conformation - Isugata Highza

One of the conformations of a cyclohexane ring. There are two conformations that can be taken while maintaining the regular tetrahedral structure of the valence of the carbon atoms that form the molecular backbone, one of which is the chair conformation. The other is called the boat conformation, but as is clear from the diagram, in the boat conformation both sides of some of the CC bonds overlap, whereas in the chair conformation all are in the gauche configuration, making it more stable, and at room temperature almost all molecules are in the chair conformation. [See alternative terms] Rotational isomerism

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

シクロヘキサン環の立体配座の一つ．分子の骨格を形成する炭素原子の原子価の正四面体構造を保ったままでとりうる立体配座は二つあり，その一つがいす形である．ほかの一つは舟形とよばれるが，図でも明らかなように，舟形では一部のC-C結合の両側が重なる形になっているのに対して，いす形の場合はすべてがゴーシュ配置のため，より安定となり，常温ではほとんどすべての分子がいす形である．[別用語参照]回転異性

出典　森北出版「化学辞典（第2版）」化学辞典 第2版について　情報