Define the term isomerism. State two main causes of isomerism.

Draw the chain isomers of hexane (C₆H₁₄).

Draw structural formula for each of the following compounds:

(a) isomer of n-butane

(b) Vinegar

(c) 2-Propanol

(d) Ethanal

(e) Acetone

(f) Diethyl ether

(g)propanoic acid

(h)pentan-2-ol

(i)2, 2-dibromobutane

What is used to describe these compounds together?

(a) What is the special feature of the structure of:

(i) Ethene

(ii) Ethyne

(b) What type of reaction is common to both of the above compounds? Why methane does not undergo this type of reaction.

(c) What is the IUPAC name of dimethyl ether.