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Since the first report of ethylene tetramerisation to 1-octene using Cr-bis(diphenylphosphino)amine (PNP) catalysts, numerous studies have investigate the influence of ligand structure on the outcome of the catalysis. Although these studies have highlighted some key “ligand structure–reaction selectivity” relationships, a systematic study of the effect of steric bulk and basicity of various N-substituted...
Bis(diphenylphosphino)amine (PNP) ligands with different alkyl and cycloalkyl substituents attached to the N atom of the ligand backbone were synthesised and tested together with chromium as ethylene tetramerization catalysts. On activation with a methylaluminoxane-based activator, the catalysts displayed good activity and selectivity toward 1-octene and 1-hexene, with the best ligand systems containing...
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