Chapter 11.3, Problem 11.4Q

(a)

Interpretation Introduction

Interpretation:

Given pair of molecules has to be named according to IUPAC nomenclature.

Concept Introduction:

A common nomenclature of naming organic compounds has been developed by IUPAC.  By usage of this nomenclature or rules, memorizing of names of organic compounds is not necessary.

IUPAC rules for naming alkenes:

There are about five rules that has to be followed for naming an alkene and an alkyne.  They are,

• The longest continuous carbon chain in the compound that contains double bond or triple has to be identified.  This is known as parent compound.
• Suffix “–ane” (in name of alkane) is replaced with “-ene” for alkene or “-yne” for alkyne.
• Numbering has to be done so that the lowest number is given to the double or triple bond.
• Naming and numbering has to be given for each atom or group that is attached to the parent chain.  Numbering has to be done in a way that substituents get the least numbering.
• If the alkenes have more than one double bond they are called as alkadienes (two double bonds) or alkatrienes (three double bonds).  Appropriate suffix has to be used depending on the number of multiple bonds present in the compound.
• Stereoinformation has to be included in the IUPAC name in the starting.  This can be either cis- or trans- for alkene.

(b)

Interpretation Introduction

Interpretation:

Given pair of molecules has to be named according to IUPAC nomenclature.

Concept Introduction:

Refer part (a).