Abstract
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, CF3CH2OH, (CF3)2CHOH, and (CF3)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.
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Andrieu, J., Belkova, N.V., Besora, M. et al. Hydrogen bonding and proton transfer involving the trihydride complexes Cp*M(dppe)H3 (M = Mo, W) and fluorinated alcohols: the competitive role of the hydride ligands and metal. Russian Chemical Bulletin 52, 2679–2682 (2003). https://doi.org/10.1023/B:RUCB.0000019886.18334.55
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DOI: https://doi.org/10.1023/B:RUCB.0000019886.18334.55