Chapter 11, Problem 11.48AP

Interpretation Introduction

Interpretation:

Double bond in the in the given molecule has to be labeled as cis or trans and IUPAC name has to be given.

Concept Introduction:

Cis isomer: When the two functional groups are present on the same side of the double bond, then the compound is said to be as cis isomer.

Trans isomer: When the two functional groups are present on the opposite side of the double bond, then the compound is said to be as trans isomer.

IUPAC nomenclature for alkene:

There are about eight rules to be followed while giving IUPAC name for alkene.

• The suffix –ane has to be replaced with the suffix –ene.  This is used to indicate the presence of double bond.
• The longest continuous chain of carbon atoms has to be chosen that contains both carbon atoms of the double bond.
• The parent carbon chain has to be numbered in a way so that the numbering begins at the end near to the double bond.  In case if the double bond is equidistant from both ends, then numbering has to be done from the end that is closer to substituents.
• The position of the double bond has to be given a single number which is lower‑numbered carbon atom that is present in the double bond.
• Suffixes like –diene, -triene, -tetrene, and so on are used when the compound contains more than one double bond.