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Substitution of CO by picolines and amines in RhCl(CO)(PR3)2. Synthesis and crystal structure of cis-RhCl(3-pic) {P(OPh)3}2.
Autorzy
Rok wydania
1991
Czasopismo
Journal of Organometallic Chemistry
Numer woluminu
419
Strony
391-398
DOI
10.1016/0022-328X(91)80251-E
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The title complex, cis-RhCl(3-pic){P(OPh)3}2 (3-pic = 3 picoline), has been prepared with two other isostructural rhodium complexes, respectively with 4-picoline and CH2CHCH2NH2. The RhCl(3-pic){P(OPh)3}2 compound crystallizes in space group P with a = 10.531(6), b = 12.025(9), c = 15.943(8) Å, α = 83.01(5), β = 79.46(4), γ = 86.33(5)°; Z = 2. The RhCl(amine){P(OPh)3}2 complexes were obtained in the reactions of [Rh(μ-OMe)(cod)]2, [Rh(μ-Cl)(cod)2 (cod = cycloocta-1,5-diene) or RhCl(CO){P(OPh)3}2 with amines. CO substitution by amines RhCl(CO)(PR3)2 complexes [PR3 = P(OMe)3, P(OPh)3, P(O-o-MeC6H4)3, P(O-m-MeC6H4)3, PEt2Ph, PEtPh2, PMe2Ph, PMePh2 or PPh3] is limited by steric properties of amine and PR3 ligands. 3-Picoline substitutes CO only in complexes with PR3 ligands with cone angle γ ⩽ 140° [16]. The rate of CO substitution by 2-picoline is less than half that by 3-picoline.
Adres publiczny
https://doi.org/10.1016/0022-328X(91)80251-E
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