Synthesis, Structure, and Reactivity of a Thorium Metallocene Containing a 2,2′-Bipyridyl Ligand
作者:Wenshan Ren、Guofu Zi、Marc D. Walter
DOI:10.1021/om201015f
日期:2012.1.23
The reduction of [eta(5)-1,2,4-(Me3C)(3)C5H2](2)ThCl2 (1) with potassium graphite in the presence of 2,2'-bipyridine gives the purple thorium bipy metallocene [eta(5)-1,2,4-(Me3C)(3)C5H2](2)Th(bipy) (2) in good yield. Complex 2 has been characterized by various spectroscopic techniques, elemental analysis, and single-crystal X-ray diffraction. Complex 2 is a good synthon for low-valent thorium, as shown by the reactivity with silver halides, trityl chloride, pyridine-N-oxide, RN3, 9-diazofluorene, and diphenyl diselenide, yielding the halide metallocenes [eta(3)-1,2,4-(Me3C)(3)C5H2](2)ThX2 (X = Cl (1), F (3), Br (4)), oxo metallocene [eta(3)-1,2,4-(Me3C)(3)C5H2](2)ThO(py) (5), imido metallocenes (Me3C)(3)C5H2](2)Th=NR (R = p-tolyl (6), Ph3C (7), Me3Si (8), (9-C13H8)=N (9)), and selenido complex [eta(3-)1.2.4-(Me3C)(3)C5H2]Th(SePh)(3)(bipy) (10a), in quantitative conversions.