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UV-Visible, ESR data, and magnetic moments.
| Compound | Transitions (cm−1) | Assignments | Geometry | ESR | Magnetic moment (B.M) | |
|---|---|---|---|---|---|---|
| gII | g⊥ | |||||
| BEF | 260 nm | π → π∗ | — | — | — | — |
| 370 nm | n → π∗ | |||||
|
| ||||||
| BEF–Cu | 14295 | 1 B g → 2 E g | Octahedral | 2.21 | 2.11 | 1.85 |
| 16465 | 1 B g → 2 E g | |||||
| 24580 | Charge transfer | |||||
|
| ||||||
| BEF–Ni | 12474 | 3 T 2g(F)← 3 A 2g(F), | Octahedral | — | — | 3.05 |
| 14642 | 3 T 1g(F)← 3 A 2g(F) | |||||
| 24370 | 3 T 1g(P)← 3 A 2g(F) | |||||
|
| ||||||
| BEF–Zn | — | — | Octahedral | — | — | Diamagnetic |
