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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Neutral and Cationic Ruthenium(II) Complexes with Trifunctional Phosphane Ligands
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Neutral and Cationic Ruthenium(II) Complexes with Trifunctional Phosphane Ligands

机译:具有三官能磷配体的中性和阳离子钌(II)配合物

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Compounds of the type [RuCl_2(RPX_2)_2] 4-7 (R = iPr, tBu; X = CH_2CH_2OMe, CH_2CO_2Me) were prepared by reacting RPX_2 with either RuCl_3 . 3 H_2O or [RuCl_2(PPh_3)_3], respectively. In 4-7 the trifunctional phosphanes coordinate as bidentate ligands to the metal center through the phosphorus atom and the oxygen atom of a methoxy or carbonyl group. The lability of the Ru-O bond allows substitution reactions with CO, tert-butylisonitrile and phenylacetylene. The Ru-Cl bonds in 5 (R = tBu; X = CH_2CH_2OMe) can be cleaved upon treatment with one or two equiv of AgPF_6 yielding mono- or dicationic derivatives. In these complexes the ligands are coordinated to the metal center through the phosphorus and both of the oxygen donor atoms. The reaction of the phosphinoesterenolate compound 17 with Ph_2C=C=O leads to the insertion of two molecules of the ketene into the C-H bond of one of the five-membered metal-enolate rings to yield the "expanded" chelate complex 18, the structure of which was determined by X-ray crystallography.
机译:通过使RPX_2与RuCl_3反应,制备了[RuCl_2(RPX_2)_2] 4-7型的化合物(R = iPr,tBu; X = CH_2CH_2OMe,CH_2CO_2Me)。 3 H_2O或[RuCl_2(PPh_3)_3]。在4-7中,三官能膦作为二齿配体通过甲氧基或羰基的磷原子和氧原子配位至金属中心。 Ru-O键的不稳定性允许与CO,叔丁基异腈和苯乙炔进行取代反应。在用一或两个当量的AgPF_6处理时,可以裂解5中的Ru-Cl键(R = tBu; X = CH_2CH_2OMe),从而生成单或双键衍生物。在这些配合物中,配体通过磷和两个氧供体原子配位到金属中心。膦酸酯基烯酸酯化合物17与Ph_2C = C = O的反应导致将两个烯酮分子插入五元金属-烯酸酯环之一的CH键中,以产生“膨胀的”螯合物络合物18,该结构其通过X射线晶体学测定。

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