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Benzene Or  Cyclohexane ?

These two systems are very often confused by students. So let's try to emphasise the differences:
 

Structure 
Molecular formula 
C6H6
C6H12
C hybridisation 
sp2
sp3
IHD
Chemical class 
Aromatic 
Cycloalkane 
Typical reactions 
Electrophilic aromatic substitution
(Ch 12)
Free radical halogenation
(Ch 4)

© Dr. Ian Hunt, Department of Chemistry, University of Calgary