Repozytorium
Wyszukaj
Kolekcje
Inne
Rh(acac)(CO)PR3) and Rh(oxinate)(CO)(PR3) complexes - substitution chemistry and structural aspects.
Autorzy
Rok wydania
2000
Czasopismo
Journal of Organometallic Chemistry
Numer woluminu
602
Strony
59-64
DOI
10.1016/S0022-328X(00)00118-2
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The substitution of CO in Rh(acac)(CO)2 by the phosphorus ligands P(OPh)3, P(NC4H4)3, and PPh2(NC4H4) has been studied kinetically by stopped-flow spectrophotometry as a function of temperature. With P(OPh)3 and P(NC4H4)3, both CO ligands are replaced in a stepwise fashion via the intermediate Rh(acac)(CO)(PR3). However, the disubstituted complexes Rh(acac)(PR3)2 are thermodynamically unstable. Judged from the activation parameters, the individual steps are associative processes. In the case of PPh2(NC4H4) only the monosubstituted complex is formed. The differences in the substitution rates as well as the stability of the various products are largely dominated by electronic (e.g. basicity) effects. X-ray structures of some of the mono-substituted complexes are given. In addition, also the reaction of Rh(oxinate)(CO)2 with P(OPh)3 has been studied kinetically showing that oxinate has a labilizing effect relative to acetylacetonate
Słowa kluczowe
Rhodium, Ligand substitution, Tertiary phosphines, Kinetics, Acetylacetonate
Adres publiczny
https://doi.org/10.1016/S0022-328X(00)00118-2
Strona internetowa wydawcy
Podobne publikacje
Rhodium(I) acetylacetonato complexes with functionalized phosphines.
Pruchnik Florian P., Smoleński Piotr, Wajda-Hermanowicz Katarzyna
Redox potential, ligand and structural effects in rhodium(I) complexes.
Guedes da Silva M. Fátima. C., Trzeciak Anna M., Ziółkowski Józef J., Pombeiro Armando J. L.
Novel rhodium(I) complexes with (2-hydroxyphenyl)diphenylphosphine ligand: catalytic properties and X-ray structures of Rh(OC6H4PPh2)(CO)(PPh3) and Rh(OC6H4PPh2){P(OPh) 3}2 0.5C6H6.
Trzeciak Anna M., Ziółkowski Józef J., Lis Tadeusz, Choukroun R.
