Thyil radical

If the Fe-Ni center is not redox active, at least during catalysis, then the process must be ligand-based (92). Maroney and co-workers have argued that the paramagnetic Ni-C state could be generated by the interaction of a thyil radical with a Ni(II) ion. This species is isoelectronic with a thiolate-bound Ni(III) according to the reaction... 

In the case of thyil radicals, however, the polymeric products can be formed without the participation of oxygen or water. These radicals dimerize rapidly ... 

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