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- Cyclic carbonate synthesis from CO2 and epoxides using zinc(II) complexes of arylhydrazones of beta-diketonesPublication . Moreno Montoya, Carmen Alicia; Gomez, Clara F.; Paninho, Ana B.; Nunes, Ana V. M.; Mahmudov, Kamran; Najdanovic-Visak, Vesna; Martins, Luisa; Guedes Da Silva, M. Fátima C.; Pombeiro, Armando; Nunes Da Ponte, ManuelZinc(II) complexes of arylhydrazones of beta-diketones (AHBD) were used for the first time as catalysts combined with tetrabutylammonium bromide (TBABr), in the coupling reaction between CO2 and epoxides. The influence of pressure and temperature on cyclic carbonate formation was investigated, as well as the catalytic activity toward different substrates (e.g. styrene oxide, propylene oxide and cyclohexene oxide). The molar ratio between metal complex and TBABr was determined for maximum catalytic activity.