Table 3.
Select spectroscopic and structural parameters of pseudotetrahedral L3FeIV(N) complexes.
| Complex | Fe-N stretch14N/15 N (cm-1) | Fe-N distance (Å) | Displacement of Fe from L3 plane (Å) | 15N NMR chemical shiftaδ | MB δ (mms-1) | MB ΔEQδ (m ms -1) | Ref |
|---|---|---|---|---|---|---|---|
| [PhBPiPr3]FeN | 1034/ 1007 | 1.51-1.54b | -- | 952 | -0.34(1) | 6.01(1) | [52, 131, 132] |
| [PhBPCH2Cy3]FeN | -- | 1.55b | -- | 929 | -0.34(1) | 6.01(1) | [131, 132] |
| [(TIMENmes)FeN][BPh4] | 1008/982 | 1.526(2) | 0.43 | 1121 | -0.27(1) | 6.04(1) | [51] |
| [(TIMENxyl)FeN][BPh4] | -- | 1.527(3) | 0.38 | -- | -- | -- | [51] |
| [PhB(tBuIm)3]FeN | 1028/ 999 | 1.512(1) | 0.98 | 1019 | -- | -- | [49] |
| [PhB(mesIm)3]FeN | -- | 1.499(5) | 1.01 | 1004 | -- | -- | [48] |
a
Referenced to liquid NH3 at 0 ppm.
b
Obtained by EXAFS.