For an unsymmetrical ketoxime, the 'Syn' and 'Anti' prefixes are assigned based on a specific IUPAC — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

Unsymmetrical ketoximes possess two distinct alkyl groups attached to the central carbon. The naming convention assigns 'Syn' and 'Anti' specifically relative to the alphabetically preferred alkyl group. If the nitrogen's $-OH$ group lies on the same side as the alphabetically prior alkyl group, the isomer is named 'Syn'.