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In this contribution, we report a further development within an “open” N4-ligand class obtained via condensation of 1,2-ortho-phenylene diamine with nitrogen-containing carboxylic acids. N,N-Bis(2-pyrazinecarboxamide)-1,2-benzene reacted with different cobalt precursors to form new ionic Co(iii) complexes in good yields. These compounds were successfully tested as potential catalysts for the coupling of epoxides with carbon dioxide. [ABSTRACT FROM AUTHOR]

The coupling reaction of epoxides and CO2 is in the focus of many research activities in academia as well as in the industry. In this contribution we report on a versatile aluminum-based homogeneous catalyst utilizing an easy-to-synthesize N2O2 ligand system in combination with various cocatalysts, all of them producing pure alternating poly(cyclohexene carbonate)s with Mn values in the range 10000-15000 g mol-1. This system also efficiently catalyzes the formation of propylene carbonate. [ABSTRACT FROM AUTHOR]

In this contribution, we report a further development within an “open” N4-ligand class obtained via condensation of 1,2-ortho-phenylene diamine with nitrogen-containing carboxylic acids. N,N-Bis(2-pyrazinecarboxamide)-1,2-benzene reacted with different cobalt precursors to form new ionic Co(iii) complexes in good yields. These compounds were successfully tested as potential catalysts for the coupling of epoxides with carbon dioxide. [ABSTRACT FROM AUTHOR]