Potentially Tridentate Ligands in the Synthesis of Methyl- and Acetylpalladium(II) Complexes
作者:Alessia Bacchi、Mauro Carcelli、Corrado Pelizzi、Giancarlo Pelizzi、Paolo Pelagatti、Silvia Ugolotti
DOI:10.1002/1099-0682(200208)2002:8<2179::aid-ejic2179>3.0.co;2-3
日期:2002.8
tridentate ligands HNN′O (1) and HNN′S (2) were treated with [(COD)Pd(Me)Cl], and the corresponding methylpalladium(II) complexes [Pd(η2-HNN′)(Me)Cl] (1a and 2a) were isolated. The neutral ligands in these complexes coordinated the metal in an NN′ bidentate mode, through the pyridine and imine nitrogens, excluding the O or S atom from the coordination. This behavior was confirmed by X-ray diffraction
两个质子三齿配体 HNN'O (1) 和 HNN'S (2) 用 [(COD)Pd(Me)Cl] 和相应的甲基钯 (II) 配合物 [Pd(η2-HNN')(Me )Cl] (1a 和 2a) 被分离出来。这些配合物中的中性配体通过吡啶和亚胺氮以 NN' 双齿模式与金属配位,将 O 或 S 原子排除在配位之外。这种行为通过 1, [Pd(η2-HNN')Cl2] (1c) 的二氯配合物的 X 射线衍射分析证实。配合物 1a 和 2a 很容易在碱性介质中定量转化为相应的三配位配合物 [Pd(η3-NN'X)(Me)] (1b: X = O, 2b: X = S),消除 HCl。配合物1a和1b分别用PPh3和P(CD3)3处理,得到1e和1h;1a 与双倍量的 PPh3 进一步反应生成二磷烷配合物 [trans-(PPh3)2Pd(Me)Cl] (1g) 和游离 1。三配位配合物 1b 和 2b