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首页> 外文期刊>Inorganica Chimica Acta >Coordination compounds of chromium (+3) and vanadium (+3) and (+5) with 2,6-bis(diphenylhydroxymethyl)pyridyl ligand: Synthesis and study of catalytic activity in the polymerization of ethylene
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Coordination compounds of chromium (+3) and vanadium (+3) and (+5) with 2,6-bis(diphenylhydroxymethyl)pyridyl ligand: Synthesis and study of catalytic activity in the polymerization of ethylene

机译:铬(+3)和钒(+3)和(+5)与2,6-双(二苯基羟甲基)吡啶基配体的配位化合物:乙烯聚合反应的合成和催化活性的研究

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摘要

Coordination compounds of chromium (III) and vanadium (III) and (V) with 2,6-bis(diphenylhydroxymethyl)pyridine have been synthesized. Composition and properties of the obtained complexes have been evaluated by NMR, IR spectroscopy, X-ray diffraction, and elemental analysis. Depending on the nature of the metal and the synthesis conditions, there are various types of coordination state of the terdentate pyridine ligand in the obtained complexes: it can bind either as a dianionic, bisalkoxide, terdentate (compounds 5, 7, 8, 9), monoanionic, alkoxide/alkohol, terdentate (compounds 4, 6) or as a neutral, bisalkohol, terdentate ligand (compound 3). Coordination compounds of chromium were found to be incapable of catalytic polymerization of ethylene. Catalytic activity of vanadium (III) and (V) complexes in this reaction varied between 85 and 578 kg PE/mol V h after activation with diethylaluminum chloride, depending on the V/Al ratio.
机译:合成了铬(Ⅲ),钒(Ⅲ)和(Ⅴ)与2,6-双(二苯基羟甲基)吡啶的配位化合物。已通过NMR,IR光谱,X射线衍射和元素分析评价了所得配合物的组成和性质。根据金属的性质和合成条件,所获得的络合物中的叔齿吡啶配体的配位状态有多种类型:它可以以双阴离子,双烷氧基,叔齿形式结合(化合物5、7、8、9) ,单阴离子,醇盐/醇,叔齿(化合物4、6)或作为中性,双醇,叔齿配体(化合物3)。发现铬的配位化合物不能催化乙烯的聚合。钒(III)和(V)配合物在该反应中的催化活性在用二乙基氯化铝活化后,在85至578 kg PE / mol V h之间变化,具体取决于V / Al比率。

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