Inorg Chem 2018 Nov 23;57(21):13929-13936. Epub 2018 Oct 23.
Department of Chemistry, Faculty of Pure and Applied Sciences , University of Tsukuba , 1-1-1 Tennoudai , Tsukuba , Ibaraki 305-8571 , Japan.
A new chromium(V)-oxo complex, [Cr(O)(6-COO-py-tacn)] (1; 6-COO-py-tacn = 1-(6-carboxylato-2-pyridylmethyl)-4,7-dimethyl-1,4,7-triazacyclononane), was synthesized and characterized to evaluate the reactivity of Cr(O) complexes in a hydrogen-atom transfer (HAT) reaction by comparing it with that of a previously reported Cr(O) complex, [Cr(O)(6-COO-tpa)] (2; 6-COO-tpa = N, N-bis(2-pyridylmethyl)- N-(6-carboxylato-2-pyridylmethyl)amine). Definitive differences of these two Cr(O) complexes were observed in resonance Raman scatterings of the Cr-O bond (ν = 911 cm for 1 and 951 cm for 2) and the reduction potential (0.73 V vs SCE for 1 and 1. Read More