PROTON-TRANSFER AND HYDROGEN-BONDING WITH TRANSITION-METAL ATOMS AND HYDRIDE HYDROGEN BY IR AND NMR-STUDIES

The present review considers the results of investigations of novel ty pes of hydrogen bonds inherent in transition metal complexes, namely H -bonds with the metal atom (XH...M) and with hydrogen atom of transiti on metal hydrides and boron hydrides (XH...HM), (XH...HB). The spectra l OR, NMR) evidence of the hydrogen bond formation due to interaction of proton donors with metal and hydride hydrogen as proton accepters i s presented. The thermodynamic and spectral characteristics of these h ydrogen bonds are determined. An analysis of similarity between spectr al and thermodynamic properties of the novel and classical H-bonding w ith organic bases is carried out. The participation of these hydrogen bonds in proton transfer is analyzed.