Q23 · CSIR-NET Chemistry, June 2021
Paper: CSIR-NET June 2021 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallic Compounds – General · Marks: 2 · Difficulty: Medium
The major product formed in the following reaction 
$+\ \mathrm{PhMgBr}\ \xrightarrow{[\mathrm{Pd(PPh_3)_4}]}$
$+\ \mathrm{PhMgBr}\ \xrightarrow{[\mathrm{Pd(PPh_3)_4}]}$(a)
(b)
(c)
(d)
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Kumada coupling with Pd(0) keeps the alkene geometry, so (Z)-β-chlorostyrene gives cis-stilbene (b).
Study loop for Organometallic Compounds