Table 3. Metal–ligand distances in Å for fourth-period transition metals from the CSD (with standard deviations in parentheses).
M represents metal, OC represents oxygen from carbon, OH2 represents oxygen from water, N represents nitrogen and S represents sulfur.
| Metal | M—OC | M—OH2 | M—N | M—S |
|---|---|---|---|---|
| Mn | 1.91 (4), 2.19 (9) | 2.19 (6) | 1.99 (10), 2.29 (16) | 2.36 (7), 2.64 (9) |
| Fe2+ | 2.18 (9) | 2.10 (4) | 1.97 (4), 2.18 (5) | 2.27 (9) |
| Fe3+ | 2.04 (9) | 2.10 (6) | 1.67 (2), 2.08 (12) | 2.28 (8) |
| Co | 1.90 (2), 2.10 (9) | 2.10 (5) | 1.95 (5), 2.14 (6) | 2.26 (11) |
| Ni | 1.86 (4), 2.07 (7) | 2.08 (6) | 1.89 (4), 2.09 (7) | 2.18 (3), 2.46 (10) |
| Cu+ | 2.10 (28) | 1.98 (3), 2.33 (13) | 2.02 (9) | 2.34 (16) |
| Cu2+ | 2.12 (28) | 1.97 (3), 2.37 (17) | 2.03 (8) | 2.33 (12) |
| Zn | 2.15 (26) | 2.09 (8) | 2.10 (9) | 2.38 (13) |