Ni(II), Co(II) and Mn(II) tris(pyrazolyl)borate complexes with 2,6-di-tert-butyl-4-carboxy-phenol: Formation of coordinated phenoxyl radical

It was found that coordination of Ni and Co complexes to 2,6-di-tert-butyl-4-carboxy-phenoxyl led to stabilization of this radical.