Question

What is isomerism ? Write isomers of butane and pentane. Answer the given question in brief.

Answer 1

Butane (C4H10) has two structural isomers. Isomer 1 is the straight chain normal structure for butane Changing the shape of the molecule does not produce a different isomer. A different isomer can only be made by changing the way in which the carbon atoms are joined together (see previous page). Look at the these illustrations of isomers of pentane below. n-pentane Isomer of Pentane n-pentane Same Isomer of Pentane showing Different Shape n-pentane Same Isomer of Pentane showing Different Shape These isomers are all the same. Although the shape of the molecule has been changed, if you look at the way in which the carbon atoms are joined to each other, you will see that isomers 2 and 3 are the same as isomer 1. (called n-butane). n-butane - Isomer of Butane Structural Formula Isomer 2 (called 2-methylpropane) is a different structure with a branched chain which has a carbon* atom joined onto three other carbon atoms. 2-methylpropane - Isomer of Butane Structural Formula The two isomers are different compounds with different boiling points. Note that for both isomers, each carbon atom has four bonds (valency 4), and each hydrogen atom has one bond (valency 1). Valency is the combining power of an atom. You cannot change the number of bonds which each atom has. Changing the shape of the molecule does not produce a different isomer.

Answer 2

Answer:

Isomerism, the existence of molecules that have the same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties.

Isomerism, the existence of molecules that have the same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties.Pentane has three structural isomers that are n-pentane, Iso-pentane (methyl butane) and neopentane (dimethylpropane).

Explanation:

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