Condensed structures alkenes

Consider a hydrocarbon having three carbon atoms linked by the bonds shown below.

Choose the number of hydrogens at each carbon in the chain.

C

= C

— C

Carbon-carbon double bonds are ALWAYS shown as double lines in condensed structures.
Compare the condensed structure with expanded structure shown below:

Consider a hydrocarbon having four carbons linked by the bonds shown below.

Select the number of hydrogens at the carbons in the chain.

C

—

C

=

C

—

C

Dr Sheila Woodgate
© The University of Auckland 2002