Chapter 20, Problem 40PP

Interpretation Introduction

Interpretation:

The systematic IUPAC name and constitutional isomers of each group substituent in the given molecular formula should be draw and identified.

Concept introduction:

1. 1. IUPAC Nomenclature Method

Any organic molecule can be named by using certain rules given by IUPAC (International Union for Pure and applied chemistry). IUPAC name consists of three parts in major namely Prefix suffix and root word.

Prefix represents the substituent present in the molecule and its position in the root name.

Suffix denotes the presence of functional group if any in the molecule. It can be an alkene, alkyne, alcohol, carboxylic acid, alcohol etc...

For alkynes molecules, suffix will be ‘yne’. (or) The saturated alkane molecule, suffix will be ‘ane’.

Root word represents the longest continuous carbon skeleton of the organic molecule.

1. 2. Stereo chemical Method:

Two stereoisomers are there for an saturated alkane molecule. It depends upon the location of bulky group (or high molecular weight) on the triple bonded carbon atoms. If the bulky groups are in same side then it is cis-isomer. If the bulky groups are in opposite side then it is trans-isomer.

Constitutional Isomers: The compounds that have the same molecular formula but different in their chemical structures.

To identify: The systematic (IUPAC) name for the given molecule (a and b).