The protonation of complexes Cp*M(dppe)H3 (dppe is ethylenebis(diphenylphosphine), M = Mo (1), W (2)) by a variety of fluorinated alcohols of different acid strength (FCH2CH2OH, CF 3CH2OH, (CF3)2CHOH, and (CF 3)3COH) was investigated experimentally by the variable temperature spectroscopic methods (IR, NMR) and stopped-flow technique (UV-Vis). The structures of the hydrogen-bonded and proton transfer products were studied by DFT calculations. In agreement with the calculation results, the IR data suggest that the initial hydrogen bond is established with a hydride site for complex 1 and with the metal site for complex 2. However, no intermediate dihydrogen complex found theoretically was detected experimentally on the way to the final classical tetrahydride product.
|Journal||Russian Chemical Bulletin|
|Publication status||Published - 1 Dec 2003|
- Hydrogen bonding
- IR spectroscopy
- Proton transfer
- Transition metal polyhydrides
- UV-Vis NMR spectroscopy