Interaction of hydrogen fluoride with ruthenium tetroxide

Abstract In the course of the studies concerning hydrolysis of ruthenium fluorides and fluorination of ruthenium hydroxides, we frequently noticed the formation of a volatile substance which showed a strong absorption band at 1030 cm −1 . We pursued this unknown substance and found that it was an adduct between ruthenium tetroxide and hydrogen fluoride: This new adduct, RuO 4 (HF) 10 , is observable at temperature higher than 0°C and at HF pressure greater than 150 mmHg. Between 4000 and 200 cm −1 , the adduct shows two absorption bands—1030 cm −1 and 389 cm −1 . At 0°C, the adduct in the gas-phase disappears for condensation. On the basis of these results, credibility of the earlier literature on RuF 8 was discussed.