Germanium(<scp>iii</scp>) corrole complex: reactivity and mechanistic studies of visible-light promoted N–H bond activations
作者:Huayi Fang、Zhen Ling、Ke Lang、Penelope J. Brothers、Bas de Bruin、Xuefeng Fu
DOI:10.1039/c3sc52326h
日期:——
The [(TPFC)Ge(TEMPO)] (1, TPFC = tris(pentafluorophenyl)corrole, TEMPO = (2,2,6,6-tetramethylpiperidin-1-yl)oxyl) complex was characterized by X-ray diffraction and spectroscopic studies. EPR studies indicate that the weak GeâO bond in 1 is photo-cleaved to form a tetra-coordinated germanium(III) radical, [(TPFC)Ge(III)]Ë. DFT calculations show that the spin density on the germanium center in [(TPFC)Ge(III)]Ë has a significant s character. Under visible-light irradiation, 1 reacts rapidly with ammonia, primary/secondary aliphatic amines and aniline to produce (TPFC)GeâNR1R2 (R1R2 = HH, HnPr, HiPr, HtBu, HPh, Et2, iPr2) complexes in high yields (65â95%).