What are the examples of chains of carbon atoms?

Chains of carbon atoms are:

1.Different structure:

a) open – unbranched H3C-CH2-CH2-CH2-CH3 pentane, H2C = CH-CH3 propylene;

b) open – branched CH2 = C-CH3 2-methylpropene.

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CH3

c) closed C6H6 benzene.

2. Different lengths:

a) from 2 carbon atoms in the chain – H3C-CH3 ethane, H2C = CH2 ethylene;

b) up to 100 thousand carbon atoms in the chain – (C2H4) n polyethylene, (C3H6) n polypropylene;

c) nanostructures – fullerenes.

3.With different types of communication:

a) simple – single bonds H3C-CH3 ethane; H3C-CH2-CH2-CH3 butane.

b) multiple – double, triple bonds H2C = CH2 ethylene.