1007565-16-3Relevant academic research and scientific papers
Cyclometalation reactions involving C-Cl bond activation of ortho-chlorinated substrates with imine as anchoring groups by cobalt complexes
Chen, Yue,Sun, Hongjian,Floerke, Ulrich,Li, Xiaoyan
, p. 270 - 275 (2008)
The aldazines (C6H3Cl2-2,6)CH=N-NH 2 (la) and (C6H3Cl2-2,6)CH=N-N= CH(C6H3Cl2-2,6) (1b) or the Schiff bases (C6H3Cl2-2,6)CH=N-CH3) (1c), (C 6H3Cl2-2,6)CH=N(C6H5) (1d), and (C6H3Cl2-2,6)CH=N(C 10H7) (1e) were obtained by condensation of 2,6-dichlorobenzaldehyde with hydrazine, methylamine, aniline, or α-naphthylamine, respectively. Treatment of 1a-1e with [CoMe(PMe 3)4] resulted in oxidative addition of me C-Cl bond to afford the ortho-chelated cobalt(III) complexes [CoClMe(PMe3) 2-{(C6H3Clortho)-CH=N-R)] (2a-2e). The reaction of 1b, 1c with [CoCl(PMe3)3] delivered the aryl Co(III) complexes 3b, 3c containing a [C-Co-Cl] fragment, while Co(II) complexes [CoCl(PMe3)2((C6H3Cl-ortho)CH=N-R)] (3d,3e) were formed through the reaction of Id or 1e with [CoCl(PMe 3)3]. Under similar conditions, the ortho-chelated cobalt(III) complex [CoBrCl(PMe3)2((C6H 3Cl2-2,6)CH=N-CH3)] (4c) could be isolated via the reaction of [CoBr(PMe3)3] with 1c. The crystal and molecular structures of complexes 2a, 3b, 3e, and 4c were determined by X-ray diffraction.
