Chemistry - STRUCTURAL ISOMERISM Question with Solution | TestHub
In which of the following cases, cis-trans nomenclature can not be used :-
Options:(select one or more)
Answer:
Solution:
Question Explanation:
The question asks to identify the compound(s) for which cis–trans nomenclature is not applicable.
Concept:
This question is based on the limitations of cis–trans nomenclature.
Solution:
Cis/trans nomenclature is used when two identical groups are present on the double bond carbons.
1. 1,2-Dichloroethene (ClCH=CHCl). (cis/trans used)
2. But-2-enal (CH₃CH=CHCHO). (cis/trans used)
3. Azobenzene (C₆H₅N=NC₆H₅). (syn/anti nomenclature is used)
4. 3-Chloro-pent-2-ene. (All four groups are different; E/Z nomenclature is used, not
cis/trans).
Final Answer: (C) and (D)