Question

Which of the following is oxetane?
A.
B.
C.
D.

Answer 1

Hint: The compound oxetane, is a more commonly used name for the compound oxacyclobutane. From this we can determine that the required compound has 4 carbon cyclic structures where one of the carbon atoms has been substituted by an oxygen atom.

Complete Step-by-Step Solution:
While naming cyclic organic compounds, certain nomenclature rules need to be followed:
1. Determine the cyclic organic compound or the cycloalkane to be used as the parent chain. This can be determined by finding the cycloalkane with the highest number of carbon atoms.
2. In a situation where the compound contains an alkyl group, in case the alkyl group has a higher number of carbon atoms, then it would be treated as the parent chain. Otherwise, the cycloalkane would be the parent chain.
3. Next, we need to name the functional groups in their alphabetical order.
4. The naming should be done in such a way that the carbon on which the functional group is attached should have the lowest number in nomenclature.
5. If the same functional group is repeated more than once, then corresponding prefixes along with the correct position numbering of the functional group must be mentioned.
6. After all these functional groups are named, then the name of the cycloalkane can be written in the end. The name of the cycloalkane depends on the number of carbon atoms present in the cyclic compound.
The given compound is oxetane. This is a more commonly used name for the compound oxacyclobutane.
From this we can determine that the required compound has 4 carbon cyclic structure where one of the carbon atoms has been substituted by an oxygen atom.

Hence, Option B is the correct option.

Note: On the basis of the IUPAC rules mentioned in the solution, we can determine the names of the other compounds as well. Their corresponding IUPAC names are: A. Oxacyclopropane; C. methanoloxacyclobutane; D. Oxapenatne.