writer：Li, DF；Li, SH；Cui, DM；Zhang, XQ
keywords：C-H bond activation,Yttrium alkyl complex,Phosphinimino-amine,Polymerization
source：会议
specific source：http://www.sciencedirect.com/science/article/pii/S0022328X10005085
Issue time：2010年

A series of phosphinimino-amine compounds (2,6–iPr₂–C₆H₃NH)C(Me)CHPPh₂(NAr) (Ar = 2,6–iPr₂–C₆H₃ (HL¹), 2,6–Et₂–C₆H₃ (HL²), 2,6–Me₂–C₆H₃ (HL³), C₆H₅ (HL⁴), 3–CF₃–C₆H₄ (HL⁵)) that existed in imine and amine forms were synthesized and fully characterized. Treatment of HL^1?5 with Y(CH₂SiMe₃)₃(THF)₂ afforded the corresponding yttrium mono- or bis(alkyl) complexes that depended significantly on the ancillary ligands. The reactions between HL^1?3 and Y(CH₂SiMe₃)₃(THF)₂ at room temperature generated mononuclear monoalkyl complexes 1–3 via deprotonation and C–H bond activation. However, when compounds HL^4,5 were used, the dialkyl complexes 4 and 5 were isolated by deprotonation only. The molecular structures of complexes 1–4 were characterized with X-ray crystallography and discussed.