Table 1.
IR data for complexes of type [(dppe)Ni(pdt)Fe(CO)2L]BF4 in CH2Cl2 solution, ordered in decreasing νCO. Data for the 13CO-labeled analogs [(dppe)Ni(pdt)Fe(13CO)2L]BF4 are included, these compounds being denoted with prime symbols.
| L | Compound | νCO/cm-1 | TEP/cm-1 |
|---|---|---|---|
| P(OPh)3 | [4a]BF4 | 2007, 1952 | 2085.3 |
| [4a′]BF4 | 1961, 1907 | ||
| P(p-C6H4Cl)3 | [4b]BF4 | 1991, 1933 | 2072.8 |
| PPh2(2-py) | [4c]BF4 | 1990, 1932 | |
| PPh2(OEt) | [4d]BF4 | 1989, 1929 | |
| PPh3 | [4e]BF4 | 1988, 1929 | 2068.9 |
| [4e′]BF4 | 1941, 1885 | ||
| PPh2(o-C6H4OMe) | [4f]BF4 | 1987, 1929 | 2066.1 |
| PPh2(o-C6H4OCH2OMe) | [4g]BF4 | 1987, 1928 | |
| P(p-tol)3 | [4h]BF4 | 1985, 1927 | 2066.7 |
| P(p-C6H4OMe)3 | [4i]BF4 | 1985, 1926 | 2066.1 |
| PMePh2 | [4j]BF4 | 1985, 1977, 1928, 1907 | 2067.1 |