A mononuclear nonheme cobalt(III) iodosylbenzene complex, [CoIII(TQA)(OIPh)(OH)]2+ (1), is synthesized and characterized structurally and spectroscopically. While 1 is a sluggish oxidant in oxidation reactions, it becomes a competent oxidant in oxygen atom transfer reactions, such as olefin epoxidation, in the presence of a small amount of proton. More interestingly, 1 shows a nucleophilic reactivity in aldehyde deformylation reaction, demonstrating that 1 has an amphoteric reactivity. Another interesting observation is that 1 can be used as an oxygen atom donor in the generation of high-valent metal-oxo complexes. To our knowledge, we present the first crystal structure of a CoIII iodosylbenzene complex and the unprecedented reactivity of metal-iodosylarene adduct.
Yang, J., Seo, M. S., Kim, K. H., Lee, Y. M., Fukuzumi, S., Shearer, J., & Nam, W. (2020). Structure and unprecedented reactivity of a mononuclear nonheme cobalt(III) iodosylbenzene complex. Angewandte Chemie - International Edition, 59(32), 13581-13585. http://doi.org/10.1002/anie.202005091
Angewandte Chemie - International Edition