Table 1. Selected 1H, 13C, 29Si and 31P NMR chemical shifts (ppm) and coupling constants (Hz) for silene hydride complexes [(dmpe)2MnH(RR′Si CHMe)] (6Ph2: R = R′ = Ph; 6Et2: R = R′ = Et; 6Ph,H: R = Ph, R′ = H; 6Bu,H: R = nBu, R′ = H; 6Ph,Et: R = Ph, R′ = Et; 6Bu,Et: R = nBu, R′ = Et); in C6D6 (6R2 and 6Ph,Et) or d8-toluene (6R,H and 6Bu,Et). Unless otherwise noted, values are from NMR spectra at 298 K. For 6R,H, NMR environments are reported for both observed isomers. Chemical shifts for 6Ph2 and 6Et2 are from our prior communication32.
| 6Ph,H | 6Bu,H | 6Ph,Et | 6Bu,Et | 6Ph2 | 6Et2 | |
| MnH[combining low line] | –14.5, –14.7 | –14.9, a –15.0 b | –14.9 | –15.3 | –14.6 | –15.3 |
| SiH[combining low line] | 4.5 c | 3.7 c | — | — | — | — |
| Si CH[combining low line]CH3 | 0.1, 0.2 | –0.1, a –0.2 b | 0.2 | –0.1 | 0.4 | 0.0 |
| Si CHCH[combining low line]3 | 1.9 c | 1.8, a 1.7 b | 1.9 | 1.7 | 2.1 | 1.8 |
| Si C[combining low line] | –21.0, –21.2 | –19.3, a –20.8 b | –21.7 | –19.3 | –22.9 | –19.4 |
| 29Si | –7.1, d –17.4 d | –8.9, a –17.0 b | 0.7 | –6.5 | –1.5 | –3.0 |
| 31P | 63.3–85.5 | 65.8–79.1 | 65.7–79.2 | 65.5–79.3 | 62.7–78.3 | 65.5–79.3 |
| 1 J C,H e | 139 f | 138, a 139 b | 137 | 138 | 136 | 137 |
aDue to the minor isomer of 6Bu,H.
bDue to the major isomer of 6Bu,H.
cBoth isomers have identical chemical shifts.
dMeasured at 213 K {because this environment was not located by 29Si{1H} or 2D 1H–29Si (HSQC or HMBC) NMR spectroscopy at 298 K}.
eCoupling between the Si C[combining low line] and Si CH[combining low line]CH3 environments.
f 1 J C,H could only be resolved for one isomer.