Syntheses and properties of 2-azaallyl Iron(I) complexes via Csp3-H bond activation

Publication date: Available online 5 May 2018 Source:Journal of Organometallic Chemistry Author(s): Junyang Xing, Hongjian Sun, Tingting Zheng, Xinghao Qi, Xiaoyan Li, Olaf Fuhr, Dieter Fenske Three novel η3-2-azaallyl iron(I) complexes, [(2-PPh2)C6H4](CH=N-CH)C6H4(4-R)]Fe(PMe3)2 (4 - 6) (R = H (4), Cl (5) and OMe (6)), were prepared through the reactions of Schiff base preligands [(2-PPh2)C6H4](CH=NCH2)C6H4(4-R)] (1 - 3) (R = H (1), Cl (2) and OMe (3)) with Fe(PMe3)4 via sp3 C-H bond activation under mild reaction conditions. Compared with the reported 2-azaallyl cobalt complexes, these are the first 2-azaallyl iron(I) complexes obtained via Csp3-H bond activation. Complex [(2-PPh2)C6H4](CH=N-CH) (C6H4)FeBr(PMe3)2 (7) was obtained through the reaction of 4 with EtBr. The ligand replacement reaction of complex 4 with CO delivered the dicarbonyl iron(I) complex [(2-PPh2)C6H4](CH-N=CH) (C6H5)Fe(CO)2(PMe3) (8). The molecular structures of complexes 4 and 6 were determined by single crystal X-ray diffraction. Graphical abstract

Source: Journal of Organometallic Chemistry - May 6, 2018 Category: Chemistry Source Type: research