Question
The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are :
JEE Advanced
Chemistry
p Block Elements (Group 15, 16, 17 & 18)
2024
JEE Advanced 2024 (Paper 2)
JEE Advanced Chemistry Question (2024) — Solution
Options
- A. [ PF _4 ]^ + [ PF _6 ]^ - and [ PCl _4 ]^ + [ PF _6 ]^ -
- B. [ PCl _4 ]^ + [ PCl _4 ~F _2 ]^ - and [ PCl _4 ]^ + [ PF _6 ]^ -
- C. PF _3 and PCl _3
- D. PF _5 and PCl _3
Answer
B. [ PCl _4 ]^ + [ PCl _4 ~F _2 ]^ - and [ PCl _4 ]^ + [ PF _6 ]^ -
Step-by-step solution
PCl _5 when fluorinated in a polar organic solvent, ionic isomers are formed. [ PCl _4^ + ] [ PCl _4 ~F _2 ]^ - (colorless crystals) [ PCl _4^ + ] [ PF _6 ]^ - (white crystals)
Related: Chemistry — p Block Elements (Group 15, 16, 17 & 18) · All PYQ Banks