Rich C–H bond activations of yttrium alkyl complexes bearing phosphinimino-amine ligands
作者:Danfeng Li、Shihui Li、Dongmei Cui、Xuequan Zhang
DOI:10.1016/j.jorganchem.2010.09.005
日期:2010.12
Aseries of phosphinimino-amine compounds (2,6-iPr(2)-C6H3NH)C(Me)CHPPh2(NAr)(Ar = 2,6-iPr(2)-C6H3 (HL1),2,6-Et-2-C6H3 (HL2),2,6-Me-2-C6H3 (HL3), C6H5 (HL4), 3-CF3-C6H4 (HL5)) that existed in imine and amine forms were synthesized and fully characterized. Treatment of HL1-5 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 HL1-3 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 HL4,5 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. (c) 2010 Elsevier B.V. All rights reserved.