In the given complexes, the heteroleptic complexes is/are:
A. \([Co(NH_3)_6]^{3+}\)
B. \([Cr(H_2O)_6]^{3+}\)
C. \([NiCl_2(PPh_3)_2]\)
D. \([Co(NH_3)_4Cl_2]^+\)
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → C and D only
Count the kinds of donor groups round the metal in each complex: one kind makes it homoleptic, more than one kind heteroleptic.
(A) \( \ce{[Co(NH3)6]^{3+}} \) — only \( \ce{NH3} \) ligands: homoleptic.
(B) \( \ce{[Cr(H2O)6]^{3+}} \) — only \( \ce{H2O} \) ligands: homoleptic.
(C) \( \ce{[NiCl2(PPh3)2]} \) — \( \ce{Cl^{-}} \) and \( \ce{PPh3} \): heteroleptic.
(D) \( \ce{[Co(NH3)4Cl2]^{+}} \) — \( \ce{NH3} \) and \( \ce{Cl^{-}} \): heteroleptic.
NCERT (2026-27 edition):
Homoleptic and Heteroleptic Complexes
