Table 4.
1H, 13C and 15N NMR chemical shifts of 1–3 complexes in DMSO-d6. The coordination shifts are shown in parentheses *.
| Compound | δH6 | δC6 | δC2 | CO | δN1 | δN1′ | δCp |
|---|---|---|---|---|---|---|---|
| 1 | 9.09 (+0.43) |
157.6 (+8.2) |
153.2 (−1.5) |
185.3 (−8.8) |
−154.9
(−92.1) |
−154.9 | – |
| 2 | 8.93 (+0.27) |
155.4 (+6.0) |
152.0 (−2.7) |
185.8 (−8.3) |
−167.5
(−114.7) |
−167.5 | 89.8 (−2.7) |
| 3 | 9.61 (+0.95) |
153.1 (+3.7) |
155.6 (+0.9) |
210.0
(+15.9) |
−160.3
(−97.5) |
−66.6 (−3.8) |
– |
| py2CO | 8.66 | 149.4 | 154.7 | 194.1 | −62.8 | – | – |
* Δcoord. = δcomplex – δligand; Cp(Ir)-η5-pentamethylcyclopentadienyl.