Table 4: Electronic spectral data, λmax bands, corresponding frequencies, and assignments of all ternary metal complexes.

ComplexB (free ion)Dq (cm−1)λmax (nm)Wavenumber (cm−1)AssignmentsB (complex)βGeometry

(1)9701007376ν3 = 265967640.788Tetragonal distortion pseudosquare pyramidal (distorted octahedral)
512ν2 = 19531

(2)1080894390ν3 = 256413A2(F) ⟶3T1(P)765.230.709Tetragonal distortion pseudosquare pyramidal (distorted octahedral)
632ν2 = 158223A2(F) ⟶ 3T2(F)
740ν1 = 135863A2(F) ⟶ 3T1(F)

(3)1107506ν2 = 197631007Tetragonal distorted (square planar)
636ν1 = 15723(dx2−y2dz2)
(dx2−y2dxz)

(4)221ν1 = 45249Charge transferTetragonal distortion pseudosquare pyramidal (distorted octahedral)