Question

which term correctly describes the relative position of the two substituents on the benzene ring in the compound below? chemical structure image options: trans, cis, ortho, para, meta

Explanation:

1. Recall the terms for substituent positions on a benzene ring:

• Ortho (ortho - o) means substituents are on adjacent carbon atoms (1,2 - positions).
• Meta (meta - m) means substituents are separated by one carbon atom (1,3 - positions).
• Para (para - p) means substituents are on opposite carbon atoms (1,4 - positions).
• Cis and trans are used for alkenes or cyclic compounds with double bonds or rings with two substituents on different atoms, not for benzene ring substitution (benzene is a planar ring with single and double bonds delocalized, and the terms for its substituents are ortho, meta, para).

1. Analyze the given benzene ring: The two substituents ($\ce{CF3}$ and the carbon - containing group attached to the ring) are on adjacent carbon atoms (1,2 - positions) of the benzene ring. So the correct term is ortho. The terms cis and trans are not applicable here as they are for different structural contexts (like alkenes or cyclic compounds with specific stereochemistry requirements different from benzene substitution). Meta would be for 1,3 - positions and para for 1,4 - positions, which do not match here.

Answer:

ortho