Table 4. Comparison of Selected Bond Lengths (Å) and Angles (deg) of 7, [Li(THF)3]2[Fe2(CO)8] (Li-N),44 and [Na(DMF)3]2[Fe2(CO)8] (Na-N)43.
| 7 | [Li-N] | [Na-N] | |
|---|---|---|---|
| Fe–Fe | 2.552(8) | 2.551(1) | 2.804(1) |
| Fe–Cbridged | 1.951(4) | 1.929(8) | |
| Cbridged–N/O | 1.266(6) | 1.216(9) | |
| Fe–Cterminal | 1.838(5) | 1.765(8) | 1.781(2) |
| Cterminal–N/O | 1.176(6) | 1.164(1) | 1.158(2) |
| Fe–Cterminal–N/O | 170.7(4) | 177.5(7) | 176.8(2) |