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Titolo:
Synthesis and characterization of neutral and cationic organopalladium complexes containing an imidazolylphosphine P,N-ligand and their carbonylationreactions
Autore:
Jalil, MA; Fujinami, S; Nishikawa, H;
Indirizzi:
Kanazawa Univ, Fac Sci, Dept Chem, Kanazawa, Ishikawa 9201192, Japan Kanazawa Univ Kanazawa Ishikawa Japan 9201192 wa, Ishikawa 9201192, Japan
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
fascicolo: 7, , anno: 2001,
pagine: 1091 - 1098
SICI:
1472-7773(2001):7<1091:SACONA>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
PALLADIUM(II)-CATALYZED ALTERNATING COPOLYMERIZATION; CARBON-MONOXIDE INSERTION; LIGAND C6H4-2-PPH2C(H)COCH2PPH3; COORDINATION CHEMISTRY; CO INSERTION; ABINITIO MO; PALLADIUM; CATALYSIS; OLEFINS; PD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
65
Recensione:
Indirizzi per estratti:
Indirizzo: Nishikawa, H Kanazawa Univ, Fac Sci, Dept Chem, Kakuma Machi, Kanazawa, Ishikawa 9201192, Japan Kanazawa Univ Kakuma Machi Kanazawa Ishikawa Japan 9201192 an
Citazione:
M.A. Jalil et al., "Synthesis and characterization of neutral and cationic organopalladium complexes containing an imidazolylphosphine P,N-ligand and their carbonylationreactions", J CHEM S DA, (7), 2001, pp. 1091-1098

Abstract

Several new neutral and cationic organopalladium complexes containing a P-N chelating ligand, 2-(diisopropylphosphinomethyl)- 1-methylimidazole, havebeen synthesized and characterized. The neutral complexes [PdPh( I) ( P-N)] 1 and [PdMe(I)(P-N)] 2 have been synthesized by oxidative addition of PhIand MeI, respectively to Pd( dba) 2 (dba = dibenzylideneacetone) in the presence of the P-N ligand. The cationic complexes [PdPh( PPh3)( P-N)] BF4 3 and [PdMe(PPh3)(P-N)] BF4 4 were obtained by adding an acetone solution of AgBF4/PPh3 to the corresponding neutral precursors 1 and 2, respectively. Acationic allyl complex, [Pd(3-C3H5)(P-N)] Br 5, has also been prepared by oxidative addition of 3-bromopropene to Pd( dba) 2 in presence of the P-N ligand. Single crystal structure determinations have been carried out for 1,4 and 5. Carbonylation of the metal-carbon bond in these new complexes wasalso studied. The neutral complexes 1 and 2 react smoothly with CO to givecarbonylated products [Pd(C(O) Ph) I( P-N)] 6 and [Pd(C(O) Me) I(P-N)] 7, respectively. The methyl complex 2 reacted much faster than the phenyl complex 1. The cationic complexes 3 and 4 are inert and do not give any carbonylated product. However, in the case of the reaction of 3, evidence has beenobtained for the formation of a CO-coordinated complex [PdPh(PPh3)(CO)(P-N)] BF4 8 in which the P-N ligand temporarily acts as a monodentate phosphorus-bonded ligand. On the other hand, a cationic complex containing a weaklycoordinating acetone molecule, [PdMe{(CD3)(2)CO}(P-N)] BF4 9, showed an enhanced reactivity toward CO and gave [Pd{MeC(O)}(CO)(P-N)] BF4 10.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 18:47:12