PdFCIBrI2−has n number of geometrical isomers. Then , the spin-only magnetic moment and crystal field stabilization energy [CFSE] of FeCN6n−6 respectively, are :            (Note : ignore the pairing energy )

The given complex is [MABCD] type complex ⇒ No. of G.I  n=3The cyanide complex is FeCN63−Fe3+→d5  Config  +SFLCFT config:−t2g221   eg00no  of unpaired e−=1                                  ⇒μ11+2=3                                                                                                                                                    =173BMCSFE=-0.4Δ0×nt2g+0.6Δ0×neg=-0.4Δ0×5+0.6Δ0×0=-2.0Δ0