Low‐pressure catalyst: A novel dizinc complex (1) having a macrocyclic ancillary ligand shows remarkable activity for the copolymerization of carbon dioxide and cyclohexene oxide, at only one atmosphere of CO2. TON=turnover number; TOF=turnover frequency.
Ring closure reactionsRing closure reactions O 0130 Zirconium-Catalyzed Enantioselective Hydroamination/Cyclization. -A chiral zirconium alkyl cation catalyzes the cyclization of certain aminoalkenes with enantioselectivities up to 82%, the highest thus observed so far for such a process. -(KNIGHT, P. D.; MUNSLOW, I.; O'SHAUGHNESSY, P. N.; SCOTT*, P.; Chem. Commun. (Cambridge) 2004, 7, 894-895; Dep. Chem., Univ. Warwick, Coventry CV4 7AL, UK; Eng.) -M. Paetzel 33-046
Zink statt Druck: Der neuartige Dizinkkomplex 1 eines makrocyclischen Liganden vermittelt die Copolymerisation von Kohlendioxid und Cyclohexenoxid mit erstaunlicher Aktivität – selbst wenn der CO2‐Druck nur 1 atm beträgt. (TON und TOF sind die Umsatzzahl bzw. ‐frequenz.)
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