1.

Amongst the given option, the compound(s) in which all the atoms are in one plane in all the possible conformations (if any), is/are

Answer»



`H_(2)C=C=CH-CH_(3)`
`H_(2)C=C=CH_(2)`

SOLUTION :CONSIDER conformers of (A) about c-2 and c-3. ONE of the conformer of (A) will not have all ATOMS in one PLANE.


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