首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Palladium(II) complexes containing N,N0-bidentate N-(pyridin-2-ylmethyl)aniline and its derivatives: Synthesis, structural characterisation, and methyl methacrylate polymerisation
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Palladium(II) complexes containing N,N0-bidentate N-(pyridin-2-ylmethyl)aniline and its derivatives: Synthesis, structural characterisation, and methyl methacrylate polymerisation

机译:含N,N0双齿N-(吡啶-2-基甲基)苯胺及其衍生物的钯(II)配合物:合成,结构表征和甲基丙烯酸甲酯聚合

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摘要

The reaction of [Pd(CH_3CN)_2Cl_2] with N-(pyridin-2-ylmethyl)aniline (L_1) and its derivatives (L_2-L_6) in ethanol yields [(NN')PdCl_2] complexes, namely [L_nPdCl_2] (L_n = L_1-L_6). The X-ray crystal structure of Pd(II) complexes revealed that the palladium atom in [L_nPdCl_2] (L_n = L_1-L_6) showed a square plane geometry involving two nitrogen atoms of NN'-bidentate and two chlorido ligands. Complex [L_4PdCl_2] containing 2,4,6-trimethyl-N-(pyridin-2-ylmethyl)aniline (L_4) showed the highest catalytic activity for the polymerisation of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) with an activity of 1.41 × 10~5 g PMMA/mol Pd?h at 60 ℃ and poly(methyl methacrylate) (PMMA) syndiotacticity (characterised using ~1H NMR spectroscopy) of ca. 0.70.
机译:[Pd(CH_3CN)_2Cl_2]与N-(吡啶-2-基甲基)苯胺(L_1)及其衍生物(L_2-L_6)在乙醇中的反应生成[(NN')PdCl_2]复合物,即[L_nPdCl_2](L_n = L_1-L_6)。 Pd(II)配合物的X射线晶体结构表明[L_nPdCl_2](L_n = L_1-L_6)中的钯原子显示出一个矩形平面几何结构,其中包含两个NN'-双齿和两个氯代配体的氮原子。在改性甲基铝氧烷(MMAO)存在下,含有2,4,6-三甲基-N-(吡啶-2-基甲基)苯胺(L_4)的配合物[L_4PdCl_2]对甲基丙烯酸甲酯(MMA)的聚合具有最高的催化活性。在60℃时的活度为1.41×10〜5 g PMMA / mol Pd?h,聚甲基丙烯酸甲酯(PMMA)的间规度(用〜1H NMR光谱表征)约为0.25%。 0.70。

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