674322-80-6Relevant academic research and scientific papers
Palladium-Catalyzed Ethylene/Methyl Acrylate Cooligomerization: Effect of a New Nonsymmetric α-Diimine
Meduri, Angelo,Montini, Tiziano,Ragaini, Fabio,Fornasiero, Paolo,Zangrando, Ennio,Milani, Barbara
, p. 1170 - 1183 (2013)
A new nonsymmetric bis(aryl-imino)acenaphthene (Ar-BIAN) ligand, featured by a subtle steric and electronic unbalance of the N-donor atoms, is reported. With the new ligand and the corresponding symmetrically substituted derivatives, both neutral and monocationic Pd-CH3 compounds have been synthesized and characterized. The series of the monocationic complexes [Pd(CH3)(L)(Ar-BIAN)][PF6] (L=CH3CN, dmso) has been extended to dimethyl sulfoxide derivatives. The monocationic complexes are tested as precatalysts for the ethylene/methyl acrylate cooligomerization under mild reaction conditions of temperature and ethylene pressure. The catalytic product is a mixture of ethylene/acrylate cooligomers and higher alkenes. The catalysts containing the new nonsymmetric ligand are found to be more productive than those with the symmetric Ar-BIANs. The Pd-dmso catalysts are more productive and show a longer lifetime than their Pd-NCCH3 counterparts.
Subtle balance of steric and electronic effects for the synthesis of atactic polyketones catalyzed by Pd complexes with meta-substituted Aryl-BIAN ligands
Scarel, Alessandro,Axet, M. Rosa,Amoroso, Francesco,Ragaini, Fabio,Elsevier, Cornelis J.,Holuigue, Alexandre,Carfagna, Carla,Mosca, Luca,Milani, Barbara
, p. 1486 - 1494 (2009/02/01)
Both symmetric and nonsymmetric bis(aryl)acenaphthenequinonediimine ligands, featured by substituents in meta-positions of the aryl rings, have been applied for the first time as ancillary ligands for the palladium-catalyzed CO/vinyl arene copolymerizatio
