Order of strength of legands

Strength of legands:-

Note:- (Most Important)

• Cyanide and carbonyl always make pairing if possible ammonia makes pairing after Iron in 3 – D series.
• In 4D and 5D series all legands can to make pairing because it is tendency of metals not ability of legand.

Splitting in octahedral complex cordination No.:- 6

 

Magnetic Moment:-

S = multiplicity = unpaired e^‑ / 2  = n/2

CFSE = (-0.4x + 0.6y) ∆_o

x = no. of e^- in t_2g

y = no. of e^- in eg

Extra point:-

We need at least 4e^- to avoid pairing