Metallocene catalysts for the ring-opening co-polymerisation of epoxides and cyclic anhydrides
نویسندگان
چکیده
Group 4 metallocene complexes are effective catalysts in the ring-opening copolymerisation of epoxides and anhydrides to afford bio-derived polymers.
منابع مشابه
B-podands as efficient catalysts for the ring opening of epoxides in water: A versatile and atom economical method for the synthesis of vicinal azidoalcohols
For the first time B-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. The reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.
متن کاملB-podands as efficient catalysts for the ring opening of epoxides in water: A versatile and atom economical method for the synthesis of vicinal azidoalcohols
For the first time B-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. The reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.
متن کاملNew reactivity of the uranyl ion: ring opening polymerisation of epoxides.
The uranyl aryloxide, [UO(2)(OAr)(2)(THF)(2)], and uranyl chloride, [UO(2)Cl(2)(THF)(3)] or [UO(2)Cl(2)(THF)(2)](2) act as pre-catalysts for the ring opening polymerization of propylene oxide and cyclohexene oxide. Coordination of the monomers has been investigated using (1)H EXSY spectroscopy and kinetic and thermodynamic parameters reported. NMR analyses of the polymers suggest a bimetallic m...
متن کاملHeterogeneous catalysts for the controlled ring-opening polymerisation of rac-lactide and homogeneous silsesquioxane model complexes.
In this communication we report, for the first time, the ring-opening polymerisation in the melt of rac-lactide with heterogeneous catalysts. Homogeneous model systems based on silsesquioxanes have been prepared for comparison.
متن کاملZwitterionic bis(phenolate)amine lanthanide complexes for the ring-opening polymerisation of cyclic esters.
The reaction of Sm{N(SiMe3)2}3 with the bis(phenol)amines H2O2N(R) (H2O2N(R) = RCH2CH2N(2-HO-3,5-C6H2(t)Bu2)2; R = OMe, NMe2 or Me) gave exclusively zwitterions Sm(O2N(R))(HO2N(R)). For R = OMe or NMe2 these were efficient catalysts for the ring-opening polymerisation of epsilon-caprolactone and D,L-lactide with a tendency to form cyclic esters; in contrast, no polymerisation was observed for R...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Polymer Chemistry
سال: 2022
ISSN: ['1759-9962', '1759-9954']
DOI: https://doi.org/10.1039/d2py00335j