Table 4. Summary of EPR Parametersa.
|
N,N-diallyl-tert-butylamine |
N,N-diallyl-4-fluoroaniline |
|||||
|---|---|---|---|---|---|---|
| N2 g = 2.00 |
B g = 2.05 |
A g = 2.17 |
[Co] | N2 g = 2.00 |
B g = 2.05 |
A g = 2.17 |
| 57% | – | 43% | (iPrPDI)CoN2 (1) | 63% | 33% | 4% |
| 13% | – | 87% | (TricPDI)CoN2 (2)b | – | 100% | – |
| – | 92% | 8% | (MePDI)CoN2 (4) | – | 100% | – |
| 100% | – | – | (iPrEtPDI)CoN2 (5) | 100% | – | – |
| 60% | – | 40% | 4-pyrr-(iPrPDI)CoN2 (7) | 63% | 31% | 6% |
a
Mixtures of bis(imino)pyridine cobalt dinitrogen compound under standard catalytic conditions (40 equiv of substrate, 0.2 M in PhMe at 295 K). The relative contributions of species A, B, and N2 were calculated by double integration of the absorption curves. See the Supporting Information for a full table of spectra.
b
The spectrum was recorded with 100 equiv of substrate.