Crystal structure of trans- and cis-bis(acetylacetonato)bis(trimethylphosphite)ruthenium(II) complexes and testing their catalytic activity in hydrogen generation from the hydrolysis of sodium borohydride

Abstract

Abstract Both the trans and cis isomers of [Ru(acac)2{P(OMe)3}2] were isolated in the form of single crystals and characterized by single crystal X-ray diffraction, UV–Vis, MS, 1H, 13C and 31P NMR spectroscopy. The compounds of ruthenium(II), both mononuclear complexes, crystallize in triclinic P 1 ¯ space group. The metal ion in both compounds has similar, slightly distorted octahedral coordination geometry. Both complexes were tested as catalyst in hydrogen generation from the hydrolysis of sodium borohydride. When used alone, none of the trans- and cis-[Ru(acac)2{P(OMe)3}2] complexes shows significant catalytic activity. However, the catalytic activity of cis-[Ru(acac)2{P(OMe)3}2] in the hydrolysis of sodium borohydride is significantly enhanced by the addition of two equivalents of trimethylphosphite per ruthenium into the medium.