Chapter 24, Problem 24.19QP

Interpretation Introduction

Interpretation:

Different isomers from replacing two hydrogen atoms of ethylene by a fluorine atom and a chlorine atom have to be derived. Also the structures, name, and type of isomers have to be indicated.

Concept introduction:

Structural isomer: Molecules having same molecular formula but has different bonding arrangements of atoms.

Geometric isomers of Alkenes:

Cis-isomer: When two particular atoms (group of atoms) are adjacent to each other, the alkene is known as cis-isomer.

Trans-isomer: When two particular atoms (group of atoms) are across from each other, the alkene is known as cis-isomer.

Alkene nomenclature:

• The longest continuous chain of carbon atoms is identified.
• The substituent groups attached to the parent chain is identified. A substituent group contains group of atoms attached to the carbon atom of the chain.
• While numbering the longest chain, the double bond should get least possible number.
• Write the name of the compound; the parent name written as last part of the name. The name of the substituents is written as prefix and a hyphen separates the number that the substituents attached with carbon. More than one substituent should be written in alphabetical order.
• Cis-isomer is mentioned as (Z) and trans-isomer is mentioned as (E) as prefix.