| Title | HIGH-PRESSURE NMR-STUDY OF IMINE HYDROGENATION CATALYZED BY RHODIUM(I) PHOSPHINE COMPLEXES - CHARACTERIZATION OF SPECIES PRESENT UNDER CATALYTIC CONDITIONS |
| Publication Type | Journal Article |
| Year of Publication | 1994 |
| Authors | Ball, GE, Cullen, WR, Fryzuk, MD, Henderson, WJ, James, BR, Macfarlane, KS |
| Journal | Inorganic Chemistry |
| Volume | 33 |
| Pagination | 1464-1468 |
| Date Published | Mar |
| Type of Article | Article |
| ISBN Number | 0020-1669 |
| Keywords | LIGAND, SYSTEMS |
| Abstract | A high-pressure NMR cell based upon the use of a sapphire NMR tube and simple valve design was constructed. The use of the cell to study the hydrogenation of imines under 1000-2000 psi of hydrogen mediated by [tertiary bis(phosphine)]rhodium(I) catalysts is described. Complexes of the type [{Rh(diphos)}2(mu-H)(mu-X)] (X = Cl, I, OMe), which are formed at these elevated hydrogen pressures, were characterized in situ, and the possible significance of these complexes in the catalysis is discussed. The dihydride cis-[RhH2(diphos)2]Cl, produced in a side reaction, was spectroscopically characterized at low temperature under 1200 psi of H-2. |
| URL | <Go to ISI>://A1994NE10200040 |
