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001-es BibID:	BIBFORM074562
Első szerző:	Papp Gábor (vegyész, kémikus)
Cím:	Classical and non-classical phosphine-Ru(II)-hydrides in aqueous solutions: many, various, and useful / Gábor Papp, Henrietta Horváth, Gábor Laurenczy, Imre Szatmári, Ágnes Kathó, Ferenc Joó
Dátum:	2013
ISSN:	1477-9226
Megjegyzések:	Hydrogenation of the water-soluble [{RuCl2(mtppms)2}2] (mtppms = monosulfonated triphenylphosphine) was studied in aqueous solutions in the presence of excess mtppms both with H2 and with aqueous HCOONa. Depending on the reductant, the pH and H2 pressure altogether nine hydride species were identified. In acidic solutions at 1 bar H2 pressure the known [RuHCl(mtppms)3] (1) and [{RuHCl(mtppms)2}2] (3) were formed, however, elevated pressure led to the formation of trans-[RuH2(mtppms)4] (11). In basic solutions at atmospheric pressure cis-fac-[RuH2(H2O)(mtppms)3] (12) was observed which was readily replaced by [RuH2(?2-H2)(mtppms)3] (13) at higher H2 pressures. 13 is the first water-soluble and stable ?2-H2 Ru(II)-complex stabilized only by monodentate phosphine ligands. [RuHBr(mtppms)3] (9) and [RuHI(mtppms)3] (10) were obtained analogously to 1. In concentrated aqueous HCOONa solutions (often used in H-transfer hydrogenations) the major species was trans-[RuH2(HCOO)(mtppms)]? (14) while in dilute solutions trans-[RuH2(H2O)(mtppms)3] (15) could be observed. Formation of these various hydride species offers an explanation for the earlier observed pH and pressure dependence of the rates and selectivities in hydrogenation of unsaturated aldehydes catalyzed by [{RuCl2(mtppms)2}2] + mtppms.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Dalton Transactions. - 42 : 2 (2013), p. 521-529. -
További szerzők:	Horváth Henrietta (1975-) (vegyész) Laurenczy Gábor Szatmári Imre (1985-) (vegyész) Kathó Ágnes (1954-) (vegyész, kémikus) Joó Ferenc (1949-) (vegyész)
Pályázati támogatás:	OTKA-101372 OTKA TÁMOP-4.2.1/B-09/1/KONV-2010-0007 TÁMOP
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