Q51 · CSIR NET Chemistry, June 2018
Paper: CSIR NET June 2018 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Insertion Elimination · Marks: 2 · Difficulty: Easy
For the following reaction, correct statement (S) is/are 
(A) Oxidation state of iridium increases from I to II (B) It is $\beta$-hydride elimination reaction (C) (I) and (II) both are diamagnetic (D) It is migratory insertion reaction The correct answer is
(A) Oxidation state of iridium increases from I to II (B) It is $\beta$-hydride elimination reaction (C) (I) and (II) both are diamagnetic (D) It is migratory insertion reaction The correct answer is(a)(A) only
(b)(A) and (C)
(c)(I) and (II) both are diamagnetic
(d)It is migratory insertion reaction
Answer
Answer: B ✓ checked by 4AB · confidence medium
Explanation
Heating IrCl(PPh₃)₃ ortho-metalates one PPh₃ by intramolecular C–H oxidative addition, giving Ir(III)H(aryl). Both complexes are diamagnetic (d⁸ and d⁶). It is not β-H elimination or insertion. Of the printed options, (A) and (C) (b).
Study loop for Organometallic Compounds