Drawing Organic Structures
Draw a structure corresponding to each of the IUPAC names given to the right.
Click the mouse on the names to view the structures.
The numbering sequence begins with bromine, alphabetically.
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).
This is named as a derivative of toluene, making the methyl group carbon #1 by definition.
The numbering sequence is 1,3,5 regardless of which bromine you begin with!
The numbering sequence begins with "bromine", alphabetically, and proceeds in either direction to give the same number sequence.
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".
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).
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.
Since this is a derivative of phenol, the numbering sequence begins at the hydroxyl group, by default, and proceeds in the direction to give the lowest number sequence at the first point of difference (2,3,5 not 3,5,6).
The benzene ring is the parent and the 1-bromoethyl group is simply a substituent.
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".
