Consider the catalyst in column-I and reaction in column-II.Column-I: A [(R)-BINAP]Ru$^{-2}$; B $[\mathrm{Rh(CO)_2I_2}]^{-1}$; C $[\mathrm{Pd(PPh_3)_4}]$; D (η⁶-p-cymene)Ru complex with a chelating TsN–CH–CH–NH diamine ligand (structure in the source).Column-II: i. Hydroformylation; ii. Asymmetric hydrogenation; iii. Asymmetric hydrogen transfer; iv. Heck coupling.The best match of a catalyst of column-I with the reaction in column-II is
(b)(A-i), (B-ii), (C-iii), (D-iv)
(c)(A-iii), (B-i), (C-iv), (D-ii)
(a)(A-ii), (B-i), (C-iv), (D-iii)
(d)(A-iv), (B-iii), (C-ii), (D-i)
Answer
Answer: A ✓ checked by 4AB · confidence high
The source book printed B; on checking, A is correct — see the explanation.
(R)-BINAP-Ru is the catalyst for asymmetric hydrogenation (A-ii), [Rh(CO)2I2]- matches the carbonylation/hydroformylation entry (B-i), Pd(PPh3)4 is the Heck-coupling catalyst (C-iv), and the p-cymene Ru TsN-diamine Noyori catalyst does asymmetric transfer hydrogenation (D-iii). That is option (a). The stored key B (A-i, B-ii, C-iii, D-iv) is wrong.
Explanation
A: the (R)-BINAP–Ru catalyst (Noyori) is used for asymmetric hydrogenation, ii.
B: [Rh(CO)₂I₂]⁻ is a rhodium carbonyl catalyst (Monsanto carbonylation); among the listed reactions it fits hydroformylation, i.
C: Pd(PPh₃)₄ is the Pd(0) catalyst for Heck coupling, iv.
D: the (η⁶-p-cymene)Ru–TsN-diamine complex is Noyori's asymmetric transfer-hydrogenation catalyst, iii.