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Inne
1,5-hexadiene selective hydroformylation reaction catalyzed with Rh(acac){P(OPh)3}2/P(OPh)3 and Rh(acac)(CO)(PPh3)/PPh3 complexes.
Autorzy
Rok wydania
1994
Czasopismo
Journal of Organometallic Chemistry
Numer woluminu
464
Strony
107-111
DOI
10.1016/0022-328X(94)87017-9
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Hydroformylation of 1,5-hexadiene, catalysed by the system Rh(acac){P(OPh)3}2/P(OPh)3 (I), leads to the formation of mono- and dialdehydes, 4-heptenal, 2-Me-3-hexenal and octane-1,8-dial, 2,5-Me2-hexanedial respectively. The yield of dialdehydes increases with temperature and pressure and reaches 100% at 80°C and 10 atm of CO / H2 = 1. The reaction catalyzed by Rh(acac)(CO)(PPh3) / PPh3 (II) system produces, besides dialdehydes, monoaldehydes with a terminal double bond, namely 6-heptenal and 2-Me-5-hexenal. The migration of the double bonds in monoaldehydes depends mainly on the donor properties of modifying ligands. Phosphine when used as a modifying ligand (II), because of its strong donor properties, restricts isomerization (double bond migration) and diminishes yield of 4-heptenal. In contrast, when less strongly donating ligands such as phosphites are used as modifying ligands (I), independently of its steric properties, 4-heptenal is the main reaction product.
Adres publiczny
https://doi.org/10.1016/0022-328X(94)87017-9
Strona internetowa wydawcy
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