Complex*

Band maxima

(×103 cm−1)

Interligand + charge transfer (×103 cm−1)

d-d

[MnBr2(L2]

21.37, 26.32

31.95

[CuBr2(L)2]

12.50

26.81

ν1

Dq (cm−1)

[FeBr2(L)0.75]

7.26a

726

ν1

ν2

ν3

Dq (cm−1)

B

Dq/B

β+

[CoBr2(L)3]

7.66b

13.46c

19.08d

580

1002

0.579

1.032

19.08, 20.75, 26.95

[NiBr2(L)2]

9.07e

15.20f

236

275

0.858

0.267

21.93