ИСТИНА

Transition metal hydride and borohydride complexes possess many valuable properties and useful applications. They are well known as selective reducing agents, building blocks for the synthesis of new organometallic derivatives, precursors for the production of borides, hydrides and other inorganic materials, and as hydrogenation catalysts. Nowadays they draw considerable attention in relation to hydrogen storage application. In this contribution we consider the salient aspects of their reactions with proton donors, in which hydrogen bonds play an important role. The dihydrogen bond (MH…HX) is an interaction between a transition-metal or main-group hydride (M-H) and a protic hydrogen moiety (H-X) is arguably the most intriguing type of hydrogen bond[1]. It was discovered in the mid-1990s and has been intensively explored since then. The proton transfer and hydrogen evolution pathways were studied by variable-temperature IR, UV-vis and NMR spectroscopy in low polar solvents (CH2Cl2, THF) in combination with DFT calculations. We will show common features of proton donors interaction with transition metal and main group hydrides and what happens in case of transition metal hydride complexes containing the hydroborate as a ligand[2-4]. Possible mechanisms of their transformation leading to H2 evolution will be discussed including the mechanism of amine-boranes dehydrogenation[5]. The perspective use of the hydride –proton interactions for MH and BH bonds activation and hydrogen production will be discussed.