Resonance Formulas :
Resonance Formulas Arise when delocalization of electrons occurs
Delocalization occurs when π electrons can be placed in more than one location, and still retain an equivalent structure
Greater resonance = Greater stability
Benzene Compounds :
Benzene Compounds Benzene as parent group:
Number substituents as with cycloalkanes
Name ends with “benzene”
Benzene as a substituent
Known as “phenyl-”
Name using conventions previously discussed for hydrocarbons
Naming Benzene Compounds :
Naming Benzene Compounds CH3 CH3 CH2CH3 CH2CH3 methylbenzene ethylbenzene 1-ethyl-2-methylbenzene Pause the Presentation and complete the remaining examples
Naming Hydrocarbons(with phenyl- substituents) :
Naming Hydrocarbons(with phenyl- substituents) 2-phenylpentane 2,3-diphenylpentane (E)-2,3-diphenyl-2-butene Pause the Presentation and complete the remaining examples