Arene Nomenclature - II
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

1-bromo-2-chlorobenzene

   

The numbering sequence begins with bromine, alphabetically.
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

1-ethyl-2,4-dinitrobenzene

   

 

The numbering sequence begins with "ethyl", alphabetically, and proceeds in the direction to give the lowest number sequence at the first point of difference (1,2,4 not 1,4,6).
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

para-chlorotoluene

   

 

This is named as a derivative of toluene, making the methyl group carbon #1 by definition.
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

1,3,5-tribromobenzene

   

 

The numbering sequence is 1,3,5 regardless of which bromine you begin with!
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

1-bromo-3,5-dimethylbenzene

   

 

The numbering sequence begins with "bromine", alphabetically, and proceeds in either direction to give the same number sequence.
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

ortho-bromopropylbenzene

   

 

The numbering sequence begins with "bromo", alphabetically, and proceeds in the direction to give the lowest number sequence at the first point of difference (1,2 not 1,6); ortho is an alternative to "1,2".
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

1-fluoro-2,4-dinitrobenzene

   

 

The numbering sequence begins with "fluoro", alphabetically, and proceeds in the direction to give the lowest number sequence at the first point of difference (1,2,4 not 1,4,6).
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

2-methyl-6-phenylheptane

   

 

The parent chain here is heptane, since it contains more carbons than the ring. The benzene ring is therefore a substituent and is referred to as a "phenyl" group. This molecule could also be named (1,5-dimethylhexyl)benzene.
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below: shown below:

(1-bromoethyl)benzene

   

 

The benzene ring is the parent and the 1-bromoethyl group is simply a substituent.
Using the drawing pallet on the right, draw the structure corresponding to the IUPAC name given below:

para-bromomethyltoluene

   

Since this is a derivative of toluene, the numbering sequence begins at the methyl group, by default; the bromomethyl group is simply a substituent. Recall that para is an alternative to "1,4".
That is correct!
Sorry, that is not correct. You should modify your structures and try again.
Note: Nitro groups are shown using two double-bonded oxygens.
(A pentavalent nitrogen!)
You have to enable Java and JavaScritpt on your machine !

The JavaMolecularEditor ©Novartis Crop Protection AG
Author: Peter Ertl