Complex

Magnetic moment

(B.M)

Electronic absorption spectra (cm−1)

Assignment

MnBr2 ← 3-APy (1:6)

5.85

28,260 32,151

4T2g(D) ← 6A1g 4T1g(p) ← 6A1g

NiCl2 ← 3-APy (1:6)

3.20

9105 16,024 26,545

3T2g(F) ← 3A2g 3T1g(F) ← 3A2g 3T1g(P) ← 3A2g

CoCl2 ← 3-APy (1:6)

5.17

9199 16,727 32,786

4T2g(F) ← 4T1g 4Ag2(F) ← 4T1g 4g1(P) ← 4T1g

CuCl2 ← 3-APy (1:2)

1.77

1072 28,011

2A1g ← 2B1g 2B2g ← 2B1g

ZnCl2 ← 3-APy (1:2)

Diamagnetic

CT transitions