How many isomers are possible for $C_4{H}_8{F}_2$(structural only)

Structural Isomers of C₄H₈F₂

For C₄H₈F₂, we have a four-carbon alkane chain (butane or isobutane) with two fluorine atoms substituted, considering only structural (constitutional) isomers.

Isomeric frameworks (parent chain):

• Straight chain: butane (CH₃CH₂CH₂CH₃)
• Branched chain: isobutane ((CH₃)₂CHCH₂)

For Butane Skeleton:

• 1,1-Difluorobutane (Both F atoms on C₁)
• 1,2-Difluorobutane (F atoms on C₁ and C₂)
• 1,3-Difluorobutane (F atoms on C₁ and C₃)
• 1,4-Difluorobutane (F atoms on C₁ and C₄)
• 2,2-Difluorobutane (Both F atoms on C₂)
• 2,3-Difluorobutane (F atoms on C₂ and C₃)

For Isobutane Skeleton:

• 1,1-Difluoro-2-methylpropane (Both F atoms on primary carbon)
• 1,2-Difluoro-2-methylpropane (F atoms on primary and tertiary carbon)

Final Count

In total, there are eight distinct structural isomers possible for C₄H₈F₂ considering all possible arrangements on straight-chain and branched butanes.