Compounds containing Co bound to the heavier group 14 elements are rare. Few of these compounds contain a Co that is coordinated by four nitrogen donors. CoIII(octaethylporphyrin)SnR3 was previously found to be stable in air, while its analogous alkyl porphyrin was air sensitive. The unexpected inert behavior of the Co-Sn porphyrin led us to develop systems that would allow for the investigation of the reactivity of different Co-E containing compounds and help to explain the differences in their stability. Cobaloxime compounds with the general formula of (4-tBuPy)Co(DH)2ER3 (where DH = a monoanion of dimethylglyoxime) are used to examine the change in reactivity of the Co-E bond based on the group 14 element utilized as well as the identity of the alkyl or aryl group. The effect of coordination environment of the Co was also investigated by comparing six-coordinate cobaloxime compounds with five-coordinate Co(salen) and Co(saloph) compounds. The reactivity of these compounds was examined by cleavage of the Co-E bond through oxidation with I2 or Br2, electrochemical oxidation, thermal stability, and photolysis studies.

Syntheses and reactivity studies of Co-E (where E= group 14 element) containing complexes

247th National Meeting (2014)

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