757190-72-0Relevant academic research and scientific papers
Reactions of [Ru(H2O)6]2+ with water-soluble tertiary phosphines
Kovacs, Jozsef,Joo, Ferenc,Benyei, Attila C.,Laurenczy, Gabor
, p. 2336 - 2340 (2007/10/03)
In aqueous solutions under mild conditions, [Ru(H2O) 6]2+ was reacted with various water-soluble tertiary phosphines. As determined by multinuclear NMR spectroscopy, reactions with the sulfonated arylphosphines L = mtppms, ptppms and mtppts yielded only the mono- and bisphosphine complexes, [Ru(H2O)5L]2+, cis-[Ru(H2O)4L2]2+, and trans-[Ru(H2O)4L2]2+ even in a high ligand excess. With the small aliphatic phosphine L = 1,3,5-triaza-7- phosphatricyclo-[3.3.1.13,7]decane (pta) at [L] : [Ru] = 12 : 1, the tris- and tetrakisphosphino species, [Ru(H2O)3(pta) 3]2+, [Ru(H2O)2(pta) 4]2+, [Ru(H2O)(OH)(pta)4] +, and [Ru(OH)2(pta)4] were also detected, albeit in minor quantities. These results have significance for the in situ preparation of Ru(II)-tertiary phosphine catalysts. The structures of the complexes trans-[Ru(H2O)4(ptaMe)2](tos) 4·2H2O, trans-[Ru(H2O) 4(ptaH)2](tos)4·2H2O, and trans-mer-[RuI2(H2O)-(ptaMe)3]I 3·2H2O, containing protonated or methylated pta ligands (ptaH and ptaMe, respectively) were determined by single crystal X-ray diffraction.
