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Rhodium complexes with HP(O)R2 (R=Ph,OPh) ligands- structure and catalytic reactions with phenylacetylene.
Autorzy
Rok wydania
2003
Czasopismo
Numer woluminu
77
Strony
749-756
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
In the reaction of Rh(acac)(CO)2 with HP(O)(OPh)2 the hydride rhodium(III) complex, HRh{[P(OPh)2O]2H}2 (1), was obtained. Complex (1) at room temperature catalyzes dimerization of phenylacetylene to trans-diphenylbutenyne (PhCH=CHC_CPh). The reaction of [RhCl(cod)]2 with HP(O)Ph2 and PPh3 led to the following new rhodium complexes: trans-RhCl[P(OH)Ph2]2(PPh3) (2), trans-RhCl[P(OH)Ph2](PPh3)2 (3), HRh[P(OH)Ph2]3 (4) and RhCl2{[PPh2O]2H}2[P(OH)Ph2]2 (5), characterized by 1H and 31P NMR spectra. The hydride complex (4) catalyzes a coupling of HP(O)Ph2 with PhC_CH (phosphorylation reaction) to 1-(diphenylphosphinyl)-2-phenylethene (PhCH=CHP(O)Ph2). In the first step of this reaction (4) reacts with PhC_CH forming alkene complex Rh(CH=CHPh)[P(OH)Ph2]3 (6).
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