Table 3. Selected Spectroscopic Data for Neutral and Cationic Silicon(IV) Phosphine Complexes.
| compound | 31P{1H}, ppm | 29Si, ppma | 1JSiP, Hz | ν(Si-X), cm–1 |
|---|---|---|---|---|
| [SiCl4(PMe3)2] | 2.3 | –210 | 257 | 417 |
| [SiCl3(PMe3)2][BArF] | –3.5 | –105 | 211 | 527 |
| [SiBr4(PMe3)2] | –1.2 | –284 | 227 | 321 |
| [SiBr3(PMe3)2][BArF] | 3.5 | –140 | 184 | 433 |
| [SiI3(PMe3)2][I] | 3.2 | 379 |
Recorded in CD2Cl2 at 183 K using [Cr(TMHD)3] as a relaxation agent.