What are the names of the seven isomers of C4H10O?

A = t-butyl alcohol (2-methyl-2-propanol)
B = sec-butyl alcohol (2-butanol)
C = butyl alcohol (1-butanol)
D = isobutyl alcohol (2-methyl-1-propanol)

Other constitutional isomers are ethers:
diethyl ether
methyl propyl ether
methyl isopropyl ether

To find the names of the isomers of C4H10O, we need to consider the different ways the atoms can arrange themselves while maintaining the same molecular formula.

There are four isomers that are alcohols:
1. t-butyl alcohol (2-methyl-2-propanol): This isomer has a tert-butyl group attached to the oxygen atom, with three carbon atoms in the main chain.
2. sec-butyl alcohol (2-butanol): This isomer has a secondary butyl group attached to the oxygen atom, with two carbon atoms in the main chain.
3. Butyl alcohol (1-butanol): This isomer has a straight-chain butyl group attached to the oxygen atom.
4. Isobutyl alcohol (2-methyl-1-propanol): This isomer has an isobutyl group attached to the oxygen atom.

The remaining three isomers are ethers:
5. Diethyl ether: This isomer has two ethyl groups attached to the oxygen atom.
6. Methyl propyl ether: This isomer has a methyl group and a propyl group attached to the oxygen atom.
7. Methyl isopropyl ether: This isomer has a methyl group and an isopropyl group attached to the oxygen atom.

To determine the isomers, we consider the different ways carbon atoms can be arranged in the main chain and the various positions of functional groups like -OH in the alcohols or -O- in the ethers. By listing the isomers, we can identify their names based on the IUPAC nomenclature.