Which one of the following is an example of octahedral complex ? (a) FeF6^(3-) (b) [Zn(NH3)4]^(2+)

Question

Which one of the following is an example of octahedral complex ?

(a) \(\mathrm{FeF}_{6}{ }^{3-}\)

(b) \(\left[\mathrm{Zn}\left(\mathrm{NH}_{3}\right) 4\right]^{2+}\)

(c) \([\mathrm{Ni}(\mathrm{CN}) _4]^{2-}\)

(d) \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\)

Answer 1

Correct option is (a) \(\mathrm{FeF}_{6}{ }^{3-}\)

Six ligands are required for the octahedral complex. There are 6 F^- ligands in [FeF₆]^3-.