Question -
Answer -
(a) Compounds havingthe same molecular formula but with different structures are called structuralisomers. The given compounds have the same molecular formula but they differ inthe position of the functional group (ketone group).
In structure I, ketonegroup is at the C-3 of the parent chain (hexane chain) and in structure II,ketone group is at the C-2 of the parent chain (hexane chain). Hence, the givenpair represents structural isomers.
(b) Compounds having thesame molecular formula, the same constitution, and the sequence of covalentbonds, but with different relative position of their atoms in space are calledgeometrical isomers.
In structures I and II,the relative position of Deuterium (D) and hydrogen (H) in space are different.Hence, the given pairs represent geometrical isomers.
(c) The givenstructures are canonical structures or contributing structures. They arehypothetical and individually do not represent any real molecule. Hence, thegiven pair represents resonance structures, called resonance isomers.
