Knowledge Bank

The dilute solutions of water in liquefied hydrides of Group V and VI elements ($PH3$, $A5H3$, $H2S$, and $H2Se$) have been studied by means of conventional IR spectroscopy method at 293K. The analysis of water fundamentals as going from gas phase (free state of water molecules) to the solutions (weak H- bonded complexes of water with hydride#### molecules) has been given. The relative strength of H-bonds in one hand and of the 2nd row on the other are slightly better proton acceptors as compared with the hydrides of the Group V and 3d row elements. The half-width at half-maximum (HWHM) of the line at 1675, $1172cm-1$ of water impurity in gaseous hydrides $GeH4$, $H2Se$, and $NH3$, as well as in oxygen and argon has been measured by tunable laser IR spectrometer at 293K. Taking into account the invariability of the Doppler contribution and of the gas pressure in the cell the difference by the more as order of magnitude of the HWHM and of the broadening factor values for different gases can point to the change in the character of the intermolecular interaction as going from the water in nonpolar gases (van-der-Waals interaction) to water in polar hydrides of selenium and nitrogen (H-bonding)