C5 and C6 alkanes

There are three C5 alkanes, formula C5H12

pentane, CH3CH2CH2CH2CH3 , where five carbon atoms form a straight chain.

2-methylbutane, CH3CH(CH3)CH2CH3, with one methyl branch on the second carbon of a four-carbon chain

2,2-dimethylpropane, CH3C(CH3)2CH3, with two methyl branches on the second carbon of a three carbon chain.

There are five C6 alkanes, formula C6H14

hexane, CH3CH2CH2CH2CH2CH3 , where six carbon atoms form a straight chain.

2-methylpentane , CH3CH(CH3)CH2CH2CH3 , with one methyl branch on the second carbon atom of a five-carbon chain.

3-methylpentane, CH3CH2CH(CH3)CH2CH3, with one methyl branch on the third carbon atom of a five-carbon chain.

2,3-dimethylbutane , CH3CH(CH3)CH(CH3)CH3 , with one methyl branch on the second carbon and one methyl branch on the third carbon of a four-carbon chain.

2,2-dimethylbutane , CH3C(CH3)2CH2CH3 , with two methyl branches on the second carbon of a four-carbon chain.