Abstract
AbstractA series of metallosilicate complexes (tBuO)2(RO)SiOM (R=tBu, iPr, Et, Me; M=Li, Na, K) were prepared from tailor‐made silanols. The complexes show different degree of association and feature heterocubane, double‐heterocubane or hexagonal prism framework in solid state while ESI‐MS shows fragmentation of the oligomers. The steric hindrance around the silicon atom has a direct influence over the association of the alkali derivatives, and the size of the alkali metal influences the shape of the MxOx core. These compounds were studied as initiators in the ROP of ϵ‐caprolactone, varying temperature, reaction‐time, monomer/initiator ratio, metal center variation and association degree. The best results were achieved with [{(tBuO)3SiO}4Li4] (1) producing an almost quantitive yield of polycaprolactone (97 %, Mn=35 kg mol−1, Mw/Mn=1.72).
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
