Question

Reaction of PCl\(_3\) and PhMgBr would give

• A. bromobenzene
• B. chlorobenzene
• C. triphenylphosphine
• D. dichlorobenzene

Hint:

Grignard reagents replace halogens on electrophilic phosphorus compounds producing organophosphines.

Answer 1

The Correct Option is C

Step 1: Identify reagent nature.
PhMgBr is a Grignard reagent, behaves as \(\text{Ph}^-\) nucleophile.
PCl\(_3\) is electrophilic at phosphorus.
Step 2: Substitution of Cl atoms by phenyl group.
Each chloride in PCl\(_3\) can be replaced by phenyl group from Grignard reagent.
So overall:
\[ PCl_3 + 3PhMgBr \rightarrow PPh_3 + 3MgBrCl \]
Step 3: Product formed.
The product is triphenylphosphine (PPh\(_3\)).
Final Answer:
\[ \boxed{\text{(C) triphenylphosphine}} \]