[N-Alkyl-(2-pyridyl) methanimine] copper (I) complexes: Characterisation and application as catalysts for atom-transfer polymerisation

[N-Alkyl-(2-pyridyl) methanimine] copper (I) complexes: Characterisation and application as catalysts for atom-transfer polymerisation. Haddleton, D., M., Duncalf, D., J., Kukulj, D., Crossman, M., C., Jackson, S., G., Bon, S., A., F., Clark, A., J., & Shooter, A., J. European Journal of Inorganic Chemistry, 1998(11):1799-1806, WILEY-VCH Verlag GmbH, 1998.

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The synthesis and characterisation of a series of novel bis(imine)copper(I) complexes and their use in atom-transfer polymerisation of methyl methacrylate is described. Several N-alkyl-(2-pyridyl)methanimines (alkyl = n-butyl, isobutyl, sec-butyl, n-propyl) and N-(n-propyl)-1-(2-pyridyl)ethanimine as ligands have been fully characterised. Three bis[N-alkyl-(2-pyridyl)methanimine]copper(I) complexes, [Cu(C5H4N)CH=N(iBu)2][BF4], [Cu(C5H4N)C(CH3)=N(nPr)2][PF6], and [Cu(C5H4N)CH=N(sBu)2][BF4] have been structurally characterised; all having a distorted tetrahedral arrangement of co-ordinating nitrogen atoms surrounding the metal centre. All of the catalysts were found to be effective atom-transfer polymerisation catalysts for the polymerisation of MMA in hydrocarbon solution. However, it was discovered that the performance of the catalysts containing n-alkyl substituents was superior to those containing branched alkyl substituents. The presence of branching in the alkyl substituent results in a reduction of reaction rate and a corresponding broadening of the polydispersity index.

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 title = {[N-Alkyl-(2-pyridyl) methanimine] copper (I) complexes: Characterisation and application as catalysts for atom-transfer polymerisation},
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 year = {1998},
 pages = {1799-1806},
 volume = {1998},
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 abstract = {The synthesis and characterisation of a series of novel bis(imine)copper(I) complexes and their use in atom-transfer polymerisation of methyl methacrylate is described. Several N-alkyl-(2-pyridyl)methanimines (alkyl = n-butyl, isobutyl, sec-butyl, n-propyl) and N-(n-propyl)-1-(2-pyridyl)ethanimine as ligands have been fully characterised. Three bis[N-alkyl-(2-pyridyl)methanimine]copper(I) complexes, [Cu(C5H4N)CH=N(iBu)2][BF4], [Cu(C5H4N)C(CH3)=N(nPr)2][PF6], and [Cu(C5H4N)CH=N(sBu)2][BF4] have been structurally characterised; all having a distorted tetrahedral arrangement of co-ordinating nitrogen atoms surrounding the metal centre. All of the catalysts were found to be effective atom-transfer polymerisation catalysts for the polymerisation of MMA in hydrocarbon solution. However, it was discovered that the performance of the catalysts containing n-alkyl substituents was superior to those containing branched alkyl substituents. The presence of branching in the alkyl substituent results in a reduction of reaction rate and a corresponding broadening of the polydispersity index.},
 bibtype = {article},
 author = {Haddleton, David M and Duncalf, David J and Kukulj, Dax and Crossman, Martin C and Jackson, Stuart G and Bon, Stefan A F and Clark, Andrew J and Shooter, Andrew J},
 doi = {10.1002/(SICI)1099-0682(199811)1998:11<1799::AID-EJIC1799>3.0.CO;2-6},
 journal = {European Journal of Inorganic Chemistry},
 number = {11}
}

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