Water-soluble (η6-arene)ruthenium(II)-phosphine complexes and their catalytic activity in the hydrogenation of bicarbonate in aqueous solution

Two in one: Charged tertiary phosphines held together by ionic or covalent interactions as bidentate phosphorus ligands for synthesis of half-sandwich Ru(II)-complexes

“…4 ] has been studied in hydrogenation of aldehydes [10] but this complex was found active also in hydrogenation of bicarbonate [11] and in hydration of nitriles [12]. These reactions are also catalyzed by the half-sandwich complexes formed in reactions of [(arene)RuCl 2 ] 2 and pta [13][14][15]. Half-sandwich Ru(II)-pta complexes with the general name RAPTA are subject to scrutiny not only because of their catalytic effect but also of their anticancer activity [16].…”

Water‐Soluble Group 8 and 9 Transition Metal Complexes Containing a Trihydrazinophosphaadamantane Ligand: Catalytic Applications in Isomerization of Allylic Alcohols and Cycloisomerization of (Z)‐Enynols in Aqueous Medium

“…The molecule displays the characteristic pseudooctahedral "three-legged piano-stool" geometry, the observed bond distances and angles around the metal comparing well to those found in the related PTA derivatives [RuCl 2 A C H T U N G T R E N N U N G (PTA)(h 6 -p-cymene)] [11] and [RuCl 2 A C H T U N G T R E N N U N G (PTA)A C H T U N G T R E N N U N G (h 6 -C 6 H 6 )]. [12] It is well-known that the N-protonated or alkylated forms of PTA can also act as ligands, the affinity for water of the resulting cationic complexes being enhanced when compared to that of the neutral counter- parts. [5] In this context, we have found that treatment…”

Recent Advances in Transition Metal-Catalysed Homogeneous Hydrogenation of Carbon Dioxide in Aqueous Media

“…In 2008, Gonsalvi and Laurenczy et al reported a half-sandwich iridium complex, 7, bearing a water-soluble phosphine ligand PTA. (Erlandsson et al, 2008) Compared to the ruthenium and rhodium analogous, (Horváth et al, 2004) it gave a much lower TOF of 22.6 h −1 at 100 °C. These preliminary studies implied that iridium complexes only provide low catalytic activity for the hydrogenation of CO2.…”