How many constitutional isomers of 1 bromopropane

How many constitutional isomers in C4H8ClF? 2021


I count 12 constitutional isomers of.


I. Based on butane skeleton

(a) on a terminal carbon

Four isomers:

  • 1-chloro-1-fluorobutane
  • 1-chloro-2-fluorobutane
  • 1-chloro-3-fluorobutane
  • 1-chloro-3-fluorobutane

(b) on an internal carbon

Four isomers:

  • 2-chloro-1-fluorobutane
  • 2-chloro-2-fluorobutane
  • 2-chloro-3-fluorobutane
  • 3-chloro-1-fluorobutane

II. Based on 2-methylpropane

(a) on a terminal carbon

Three isomers:

  • 1-chloro-1-fluoro-2-methylpropane
  • 1-chloro-2-fluoro-2-methylpropane
  • 1-chloro-3-fluoro-2-methylpropane

(b) on

One isomer:

  • 2-chloro-1-fluoro-2-methylpropane

"We leave it to the student as an exercise" to draw the structural formulas of the isomers.