Synergic Catalysis: the Importance of Intermetallic Separation in Co(III)K(I) Catalysts for Ring Opening Copolymerizations.

ABSTRACT: Dinuclear polymerization catalysts can show high activity and control. Understanding how to design for synergy between the metals is important to improving catalytic performances. Three heterodinuclear Co(III)K(I) catalysts, featuring very similar coordination chemistries, are prepared with different intermetallic separations. The catalysts are compared for the ring-opening copolymerization (ROCOP) of propene oxide (PO) with CO₂ or with phthalic anhydride (PA). The catalyst with a fixed, wide intermetallic separation, L_wideCoK(OAc)₂ (Co-K = 8.06 Å), shows very high activity for PO/PA ROCOP, but is inactive for PO/CO₂ ROCOP. On the other hand, the catalyst with a fixed, narrow intermetallic separation, L_shortCoK(OAc)₂ (Co-K,

SUBMITTER: Fiorentini F 

PROVIDER: S-EPMC11345820 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature