Introductory Organic and Biochemistry

Quiz: Aromatic nomenclature:
   Use of ortho, meta, para.

Ouellette 2/e Ch 5.

Answer key (but see Answers section, below).
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General purpose. This quiz is intended to illustrate the use of the special prefixes ortho, meta and para ("omp"). These prefixes can be used only with aromatic compounds, and only when there are exactly two substituents on the ring. One can always use traditional IUPAC numbering.

Because one never needs to name a compound with the omp system, I do not consider it essential in my introductory course. However, these prefixes are commonly used, and many will find it useful to be able to recognize their meaning.

Instructions. For each structure shown, give a good IUPAC name (using traditional numbering). Then, if possible, give a name using the omp system. If it is not possible to use that system with a particular compound, explain why not.

You can type your answer in the box if you wish. This is entirely for your convenience; the computer does not check your answers.

Answers. You can check yourself as you go, or you can use the usual answer key page. To check yourself as you go, move the cursor over the word "answer" at the end of each answer box; the answer will appear, after a momentary delay, in a balloon nearby.

If you think you have alternative answers that are ok, please check with me.

Quiz, Use of ortho, etc. Structures for parts a-c.
Check you answers: (For more complete instructions, see Instructions, above.)
Part a:
   IUPAC name: answer
   omp name: answer
Part b:
   IUPAC name: answer
   omp name: answer
Part c:
   IUPAC name: answer
   omp name: answer

Quiz, Use of ortho, etc. Structures for parts d-f.
Check you answers: (For more complete instructions, see Instructions, above.)
Part d:
   IUPAC name: answer
   omp name: answer
Part e:
   IUPAC name: answer
   omp name: answer
Part f:
   IUPAC name: answer
   omp name: answer


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Answer key (but see Answers section, above).

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Last update: August 18, 2011