Combinations
Home Up Heterocyclic Compounds Polycyclic Compounds Aromatic Compounds Combinations

 

Combinations

Cyclic compounds can be any combination of these three types (heterocylic, polycyclic, aromatic) or even none of them.

Our primary use of these terms will be in describing and classifying structural formulas. Let's look at some examples.

Examples

 
Structure of naphthalene. [str5naph.jpg]
naphthalene
Structure of pyrimidine. [str5pyri.jpg]
pyrimidine
str5a.jpg (2969 bytes)
adenine
heterocyclic? no yes yes
polycyclic? yes no yes
aromatic? yes yes yes

 

Practice

Practice with your ability to classify ring compounds with the examples shown below. Check your answer below and then continue with the lesson.

 
Structure of caffeine. [str5caff.jpg]
caffeine
Structure of cyclohexane. [str5chex.jpg]
cyclohexane
Structure of TNT. [str5tnt.jpg]
TNT
heterocyclic? ? ? ?
polycyclic? ? ? ?
aromatic? ? ? ?

 

Answers

 
Structure of caffeine. [str5caff.jpg]
caffeine
Structure of cyclohexane. [str5chex.jpg]
cyclohexane
Structure of TNT. [str5tnt.jpg]
TNT
heterocyclic? yes no no
polycyclic? yes no no
aromatic? no no yes

 

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E-mail instructor: Kerry Cotter

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