0000000000138918
AUTHOR
Maurizio Peruzzini
showing 3 related works from this author
Hydrierung von weißem Phosphor zu Phosphan mit Rhodium- und Iridiumtrihydriden
1998
Nur eines der vier P-Atome von P4 wird bei der Reaktion mit den Trihydriden [(triphos)MH3] (M = Rh, Ir) zu Phosphan umgesetzt [Gl. (a)]. Das zuruckbleibende cyclo-P3-Fragment wird vom entsprechenden Metallfragment unter Bildung der Komplexe [(triphos)M(η3-P3)] abgefangen. Fur die Hydrierung wird ein Mechanismus vorgeschlagen, bei dem die Komplexe [(triphos)MH(η1:η1-P4)] und [(triphos)M(η1:η2-HP4)] als Zwischenstufen auftreten; die letztgenannten Komplexe enthalten den neuartigen Hydridotetraphosphanliganden HP4−.
Hydrogenation of White Phosphorus to Phosphane with Rhodium and Iridium Trihydrides.
1998
Only one of the four P atoms of P4 reacts with rhodium and iridium trihydrides [(triphos)MH3 ] to provide phosphane [Eq. (a)]. The resulting cyclo-P3 fragment is efficiently scavenged by the metal fragment to give the complexes [(triphos)M(η3 -P3 )]. A mechanism accounting for the hydrogenation reaction is proposed in which the complexes [(triphos)MH(η1 :η1 -P4 )] and [(triphos)M(η1 :η2 -HP4 ] are intermediates. The latter complex contains the unprecedented hydridotetraphosphane ligand HP4- .
Amino-phosphanes in RhI-Catalyzed Hydroformylation: Hemilabile Behavior of P,N Ligands under High CO Pressure and Catalytic Properties
2005
International audience; The catalytic properties of rhodium complexes containing the α-, β-, or γ-amino-phosphane ligands Ph2PCH2NEt2 (α-P,N-1), Ph2PCH(Ar)NHPh [α-P,N-2; Ar = η6(o-C6H4Cl)Cr(CO)3], Ph2PCH2NPh2 (α-P,N-3), Ph2PCH2CH(Ph)NHPh (β-P,N), Ph2PCH2(o-C6H4–NMe2) (γ-P,N-1), Ph2PCH(o-C6H4–CH2NHPh) (γ-P,N-2), and the α,β-diamino-phosphane ligand Et2NCH2P(Ph)CH2CH(Ph)NHPh (α,β-N,P,N), in styrene hydroformylation have been examined. The results show that the activity increases when the number of backbone carbon atoms linking P and N decreases from 3 to 1. IR and 31P HPNMR studies in solution show that all P,N ligands adopt exclusively a κ1-P coordination mode in rhodium chloride carbonyl co…