The synthesis and characterization of a hexadentate macrocyclic Schiff-base ligand BMXD, and a novel sulfur analogue, BMXD-S, is reported. The BMXD and the BMXD-S ligands were synthesized in good yield and characterized using NMR, mass spectrometry, and elemental analysis. It has been observed that binuclear cobalt BMXD and BMXD-S complexes catalyze the conversion of atmospheric carbon dioxide to carbonate salts. Manometer measurements of CO2 uptake from headgas above a solution of the Co2BMXDadduct at 25 oC and 1 atm of CO2 gave a turnover frequency of 0.727 min-1; analogous measurements for Co2BMXD-Sadduct obtained a turnover frequency of 0.224 min-1. A product of the uptake reaction, Co2BMXD(CO3)3 has been characterized using elemental analysis, IR, mass spectrometry and single crystal x-ray diffraction. The sulfur analogue, Co2BMXD-S(CO3)3 has been characterized by elemental analysis and IR.

Synthesis and reactivity of a macrocyclic binuclear cobalt catalyst: Sequestration of CO<sub>2</sub> as a mineral carbonate

245th National Meeting (2013)

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Synthesis and reactivity of a macrocyclic binuclear cobalt catalyst: Sequestration of CO2 as a mineral carbonate

Synthesis and reactivity of a macrocyclic binuclear cobalt catalyst: Sequestration of CO₂ as a mineral carbonate