Activation of sp(3) Carbon-Hydrogen Bonds by Cobalt and Iron Complexes and Subsequent C-C Bond Formation

作者：Xu Guoqiang; Sun Hongjian; Li Xiaoyan^*

来源：Organometallics, 2009, 28(20): 6090-6095.

DOI：10.1021/om9007218

The sp(3) C-H bond activation induced by CoMe(PMe3)(4) and FeMe2(PMe3)(4) was investigated. C(sp(3))-cyclometalated complexes, based on diphosphinito PCP ligand (Ph2POCH2)(2)CH2, Co{(Ph2POCH2)(2)CH}(PMe3)(2) (1), and Fe{(Ph2POCH2)(2)MeC}(H)(PMe3)(2) (2), were obtained under mild conditions. Iodomethane is oxidatively added to 1, affording Co{(Ph2POCH2)(2)CH}(PMe3)(Me)(I) (3). Monocarbonylation of the hydrido-iron complex 2 occurs with substitution of a trimethylphosphine ligand trans to the hydrido ligand, affording Fe{(Ph2POCH2)(2)MeC}(H)(CO)(PMe3) (4). The reaction of 2 with phenylacetylene delivered the demetalated new diphosphine ligand (Ph2POCH2)(2)CHCH3 (6) and bis(phenylethinyl)iron complex Fe(PhCC)(2)(PMe3)(4) (5). The new complexes 1-4 were characterized by spectroscopic methods and by X-ray diffraction analysis.

• 出版日期2009-10-26
• 单位山东大学