This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: and B rings in decalin shows cis-trans isomerism. This isomerism is understandable as an extension of the isomerism in 1,2-dimethylcyclohexane. CH 3 CH 3 CH 3 CH 3 H H H H trans-1,2-diequatorial cis-1-equatorial-2-axial The Ring Fusions The trans and cis decalins are drawn by replacing the CH 3 groups with CH 2 groups and completing a second cyclohexane ring in a chair conformation. CH 2 CH 2 H H CH 2 CH 2 H H H H H H trans-decalin cis-decalin The H are on opposite sides. The H are on the same side. In the natural steroids, the trans A/B ring fusion is more common....
View Full Document