Cuthbert, ENT; Vittoria, A; Cipullo, R; Busico, V; Budzelaar, PHM in [Cuthbert, Eric N. T.; Budzelaar, Peter H. M.] Univ Manitoba, Dept Chem, 144 Dysart Rd, Winnipeg, MB R3T 2N2, Canada; [Cuthbert, Eric N. T.; Vittoria, Antonio; Cipullo, Roberta; Busico, Vincenzo; Budzelaar, Peter H. M.] Dutch Polymer Inst, POB 902, NL-5600 AX Eindhoven, Netherlands; [Vittoria, Antonio; Cipullo, Roberta; Busico, Vincenzo; Budzelaar, Peter H. M.] Univ Napoli Federico II, Dipartimento Sci Chim, Via Cintia, I-80126 Naples, Italy published Structure-Activity Relationships for Bis(phenolate-ether) Zr/Hf Propene Polymerization Catalysts in 2020.0, Cited 74.0. Safety of Diphenyl oxide. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8.
A series of 20 bis(phenolate-ether) ligands, in combination with Zr and Hf, was tested for performance in propene polymerization, focusing on molecular weight, stereoregularity and regioregularity of the resulting polymer. Ligand variation covers length of the aliphatic linker between the ligand halves, as well as steric bulk of the groups ortho to the phenolate oxygen. The linker length has a dramatic effect on MW: two-carbon linkers produce oligomers (M-n < 2.5 kDa) while three- and four-carbon linkers generate much higher MW (M-n typically 50-500 kDa). Stereoselectivity can be tuned using large, flat substituents in the o-phenolate position; tuning of regioselectivity is much harder. Hf catalysts are slower than their Zr analogs and do not work well with MAO/BHT (BHT = 2,6-di-tert-butyl-4-methylphenol); they are generally more selective (MW, stereo and regio). Density functional calculations agree fairly well with observed selectivities, supporting the involvement of a fac/fac coordinated active species. These O4 catalysts are considerably more flexible than e.g. metallocenes, making accurate prediction of PP microstructure a significant challenge. Safety of Diphenyl oxide. About Diphenyl oxide, If you have any questions, you can contact Cuthbert, ENT; Vittoria, A; Cipullo, R; Busico, V; Budzelaar, PHM or concate me.
Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem