Copolymerization of carbon monoxide with ethene catalyzed by bis- chelated palladium(II) complexes containing diphosphine and dinitrogen ligands

Claudio Bianchini, Hon Man Lee, Pierluigi Barbaro, Andrea Meli, Simonetta Moneti, Francesco Vizza

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Several bis-chelated palladium(II)complexes, [Pd(PP)(N-N)(x)](PF6)2, containing binary combinations of diphosphine and dinitrogen ligands have been prepared and characterized. The diphosphine ligands comprise 1,3- bis(diphenylphosphino)propane (dppp), meso-2,4-bis(diphenylphosphino)pentane (meso-bdpp), rac-2,4-bis(diphenylphosphino)pentane (rac-bdpp) and 2,2'- bis(diphenylphosphinoethyl)pentane (Etdppp), while the dinitrogen ligands are either 2,2'-bipyridine (bipy; x = 1) or 1,8-naphthyridine (napy; x = 2). The structure of [Pd(meso-bdpp)(N,N'-bipy)](PF6)2 · CH2Cl2 has been determined by an X-ray structural analysis. All the Pd(II) complexes have been tested as catalyst precursors for the copolymerization of carbon monoxide and ethene in methanol solution in either autoclaves or high- pressure sapphire NMR tubes. The combination of meso-bdpp and bipy at palladium, in conjuction with both 1,4-benzoquinone and p-toluenesulfonic acid, has shown the best catalytic performance. The different catalytic activities exhibited by the stereoisomers [Pd(meso-bdpp)(N,N'-bipy)](PF6)2 and [Pd(rac-bdpp)(N,N'-bipy)](PF6)2 has been interpreted in terms of the different spatial distribution of the phenyl rings around the metal center determined by the conformation of the six-membered metallaring.

Original languageEnglish
Pages (from-to)929-938
Number of pages10
JournalNew Journal of Chemistry
Volume23
Issue number9
DOIs
Publication statusPublished - 1999 Jan 1

Fingerprint

Palladium
Carbon Monoxide
Carbon monoxide
Copolymerization
Ligands
Autoclaves
Propane
Sapphire
Structural analysis
Spatial distribution
Conformations
Catalyst activity
Methanol
Naphthyridines
Nuclear magnetic resonance
X rays
2,2'-Dipyridyl
Catalysts
Stereoisomerism
Acids

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

Cite this

Bianchini, Claudio ; Lee, Hon Man ; Barbaro, Pierluigi ; Meli, Andrea ; Moneti, Simonetta ; Vizza, Francesco. / Copolymerization of carbon monoxide with ethene catalyzed by bis- chelated palladium(II) complexes containing diphosphine and dinitrogen ligands. In: New Journal of Chemistry. 1999 ; Vol. 23, No. 9. pp. 929-938.
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abstract = "Several bis-chelated palladium(II)complexes, [Pd(PP)(N-N)(x)](PF6)2, containing binary combinations of diphosphine and dinitrogen ligands have been prepared and characterized. The diphosphine ligands comprise 1,3- bis(diphenylphosphino)propane (dppp), meso-2,4-bis(diphenylphosphino)pentane (meso-bdpp), rac-2,4-bis(diphenylphosphino)pentane (rac-bdpp) and 2,2'- bis(diphenylphosphinoethyl)pentane (Etdppp), while the dinitrogen ligands are either 2,2'-bipyridine (bipy; x = 1) or 1,8-naphthyridine (napy; x = 2). The structure of [Pd(meso-bdpp)(N,N'-bipy)](PF6)2 · CH2Cl2 has been determined by an X-ray structural analysis. All the Pd(II) complexes have been tested as catalyst precursors for the copolymerization of carbon monoxide and ethene in methanol solution in either autoclaves or high- pressure sapphire NMR tubes. The combination of meso-bdpp and bipy at palladium, in conjuction with both 1,4-benzoquinone and p-toluenesulfonic acid, has shown the best catalytic performance. The different catalytic activities exhibited by the stereoisomers [Pd(meso-bdpp)(N,N'-bipy)](PF6)2 and [Pd(rac-bdpp)(N,N'-bipy)](PF6)2 has been interpreted in terms of the different spatial distribution of the phenyl rings around the metal center determined by the conformation of the six-membered metallaring.",
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Copolymerization of carbon monoxide with ethene catalyzed by bis- chelated palladium(II) complexes containing diphosphine and dinitrogen ligands. / Bianchini, Claudio; Lee, Hon Man; Barbaro, Pierluigi; Meli, Andrea; Moneti, Simonetta; Vizza, Francesco.

In: New Journal of Chemistry, Vol. 23, No. 9, 01.01.1999, p. 929-938.

Research output: Contribution to journalArticle

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T1 - Copolymerization of carbon monoxide with ethene catalyzed by bis- chelated palladium(II) complexes containing diphosphine and dinitrogen ligands

AU - Bianchini, Claudio

AU - Lee, Hon Man

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AB - Several bis-chelated palladium(II)complexes, [Pd(PP)(N-N)(x)](PF6)2, containing binary combinations of diphosphine and dinitrogen ligands have been prepared and characterized. The diphosphine ligands comprise 1,3- bis(diphenylphosphino)propane (dppp), meso-2,4-bis(diphenylphosphino)pentane (meso-bdpp), rac-2,4-bis(diphenylphosphino)pentane (rac-bdpp) and 2,2'- bis(diphenylphosphinoethyl)pentane (Etdppp), while the dinitrogen ligands are either 2,2'-bipyridine (bipy; x = 1) or 1,8-naphthyridine (napy; x = 2). The structure of [Pd(meso-bdpp)(N,N'-bipy)](PF6)2 · CH2Cl2 has been determined by an X-ray structural analysis. All the Pd(II) complexes have been tested as catalyst precursors for the copolymerization of carbon monoxide and ethene in methanol solution in either autoclaves or high- pressure sapphire NMR tubes. The combination of meso-bdpp and bipy at palladium, in conjuction with both 1,4-benzoquinone and p-toluenesulfonic acid, has shown the best catalytic performance. The different catalytic activities exhibited by the stereoisomers [Pd(meso-bdpp)(N,N'-bipy)](PF6)2 and [Pd(rac-bdpp)(N,N'-bipy)](PF6)2 has been interpreted in terms of the different spatial distribution of the phenyl rings around the metal center determined by the conformation of the six-membered metallaring.

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