Question

Describe isomers.draw two isomers of butane.​

Answer 1

Explanation:

Butane is an alkane with four carbon atoms so molecular formula is C4H10. It has two isomers; n-butane and isobutane.

Here n-butane is a straight-chain compound with four carbon atoms bonded with single covalent bonds.

n-butane

Another isomer is isobutane or 2-methylpropane in which three carbon atoms from the parent chain and one carbon atom is placed as the side chain at C-2 of the parent chain. All carbon atoms have 4 valencies which are satisfied either by carbon atoms or hydrogen atoms.

Isobutane or 2 - Methylpropane

The molecular formula for butane is C4H10. There are two possible isomers with this molecular formula. First one is n-butane which has all four carbon atoms in the parent chain with structural formula as

CH3-CH2-CH2-CH3

Another isomer is isobutane with three carbon atoms in the parent chain and one in the side-chain as a methyl group.

Structural formula Name of isomer

CH3-CH2-CH2-CH3 n-butane

CH3-CH2-CH2-CH3 n-butaneCH3-CH(CH3)CH3 2-methylpropane or isobutane

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