Chapter 22.2, Problem 1LTS

Interpretation Introduction

Interpretation: For a given set of nitrogen containing compound, general or IUPAC names have to be assigned.

Concept Introduction:

If ,  and groups are attached to the parent carbon, they are called primary, secondary and tertiary amines respectively.

There are two ways followed to name the compound.  First one is the method of giving general name in which name of the alkyl group followed by amine name is given.  Second one is the method giving IUPAC name in which name of the alkane group followed by amine name is given.

The length of the chain which is having more number of carbon atoms is selected as the parent or main chain.  Other chains are considered as substituents to the main chain.  Position of the substituents should be included in the name.  If one, two, three, four, five, six, etc carbons are activating as the main chain in IUPAC system, then the name of the compound comes as methane, ethane, propane, butane, pentane, hexane, etc. which are the name of alkanes.  If one, two, three, four, five, six, etc carbons are activating as the main chain in general name method, then the name of the compound comes as methyl, ethyl, propyl, butyl, pentyl, hexyl, etc. which are the name of alkyl groups.  If substituent groups are attached to nitrogen atom as in the case of tertiary or secondary amines, the name is given as N-alkyl name of the substituent.

If any configuration is present in the compound, that should be assigned to it while writing the name. If the compound contains heavier groups on the same side, it gets (Z)-configuration. If they are on the opposite directions, (E)-configuration results.

If a carbon has four different groups attached to it, that carbon shows a chirality nature.  If that chiral carbon rotates the plane polarized light into a clockwise direction, it gets (R)-isomer.  If that carbon rotates the plane polarized light into a counter-clockwise direction, it gets (S)-isomer.

To find: Assign the name for a given compound