Final answer:
There are five possible structural cyclic isomers for C5H10: Cyclopentane, Methylcyclobutane, Ethylcyclopropane, 1,1-dimethylcyclopropane, and 1,2-dimethylcyclopropane.
Step-by-step explanation:
The question relates to calculating the number of possible structural cyclic isomers with the formula C5H10. To find these isomers, we analyze different ways the carbon atoms can be connected to form a ring while still adhering to the tetravalency of carbon.
- Cyclopentane - a ring with five carbon atoms with no substituents.
- Methylcyclobutane - a four-carbon ring with one methyl (-CH3) substituent.
- Ethylcyclopropane - a three-carbon ring with an ethyl (-C2H5) substituent.
- 1,1-dimethylcyclopropane - a three-carbon ring with two methyl substituents on the same carbon atom.
- 1,2-dimethylcyclopropane - a three-carbon ring with two methyl substituents on adjacent carbon atoms.
Therefore, there are five possible structural cyclic isomers for C5H10.