What is antiperiplanar?
Understand the Problem
The question is asking for the definition of the term 'antiperiplanar', which refers to a specific arrangement of atoms in a chemical context, particularly in stereochemistry where two groups are positioned on opposite sides of a reference plane.
Answer
A molecular conformation with a dihedral angle between ±150° and 180°.
Antiperiplanar describes a molecular conformation where atoms or groups are positioned opposite each other across a single bond with a dihedral angle between ±150° and 180°.
Answer for screen readers
Antiperiplanar describes a molecular conformation where atoms or groups are positioned opposite each other across a single bond with a dihedral angle between ±150° and 180°.
More Information
Antiperiplanar is a key term in understanding the stereochemistry of elimination reactions, especially E2 mechanisms.
Tips
A common mistake is confusing antiperiplanar with synperiplanar, where groups are positioned on the same side with a dihedral angle of 0°. Always remember antiperiplanar refers to groups being opposite to each other.
Sources
- Anti-Periplanar Conformation Definition - ThoughtCo - thoughtco.com
- Antiperiplanar - Chemistry LibreTexts - chem.libretexts.org
- Antiperiplanar Relationship - E2 and the Antiperplanar Requirement - byjus.com
