Abstract
When the diphosphinito PCP ligand (Ph2P(C6H4))2CH2 (1) was treated with Fe(PMe3)4 and FeMe2(PMe3)4, the Csp3–H activation products [(Ph2P(C6H4))2CH]Fe(H)(PMe3)2 (2) and [(Ph2P(C6H4))(PhP(C6H4)2)CH]Fe(PMe3)2 (3) were obtained at room temperature. The generation of product 3 underwent one Csp3–H and one Csp2–H bond activation process. The new iron hydride complex 2 showed good activity in the catalytic hydrosilylation of aldehydes and ketones by using (EtO)3SiH as the hydrogen source under mild conditions. Complexes 2 and 3 were characterized by spectroscopic methods and X-ray diffraction analysis.
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