Es. Shubina et al., THE ROLE OF HYDROGEN-BONDS INVOLVING THE METAL ATOM IN PROTONATION OFPOLYHYDRIDES OF MOLYBDENUM AND TUNGSTEN OF MH(4)(DPPE)(2), Journal of organometallic chemistry, 493(1-2), 1995, pp. 275-277
The interactions of polyhydrides of molybdenum and tungsten of the typ
e MH,(dppe), with proton donors of different protonation ability were
studied with IR and UV spectroscopy in CH2Cl2. It was found that the f
ormation of a molecular hydrogen-bonded complex (OH ... M) (1) is the
first stage of protonation. An ionic H-complex of the type M(+)H ... O
- (2) was formed as a result of proton transfer. Deprotonation of [WH5
(dppe)(2)](+)X(-) salt was found to proceed through the intermediate f
ormation of complexes 2 and 1.