Question

Which of the following complexes shows
zero crystal field stabilization energy?
Select one
a. (Mn(H20)6134
b. [Co(H20)6]2
c. [Co(H20)6]3+
d. [Fe(H20)6]3+​

Answer 1

Answer:

option (d) is correct

[Fe(H2O) 6]3 +

Answer 2

The complexes show zero crystal field stabilization energy is d. [Fe(H20)6]3+.

• The complexes which have d5 and d10 electronic in d orbital, those compounds show zero crystal field stabilisation energy.
• In the octahedral field, energy levels are t2g and eg having energy -0.4 and 0.6 respectively and the electronic configuration is t2g3 and eg2.
• Crustal field stabilisation energy for d5 = -0.4× electrons in t2g + 0.6× electrons in eg = -0.4× 3 + 0.6×2.
• In [Fe(H20)6]3+, Fe is in a +3 oxidation state and the electronic configuration is [Ar]18 3d5.