Synthesis and Reactivity of Neutral Palladium(II) Alkyl Complexes that Contain Phosphinimine-Arenesulfonate Ligands
作者:Christopher T. Burns、Suisheng Shang、Mark S. Mashuta
DOI:10.1021/om501262r
日期:2015.5.26
The synthesis and characterization of ortho-phosphiniminium-arenesulfonate zwitterions 1a–1d, the corresponding sodium salts 3a–3d, methyl(pyridine)palladium(II) complex 4a, and methyl(4-tert-butylpyridine)palladium(II) 5a–5d complexes are reported. Complex 4a suffers from limited solubility in aromatic hydrocarbons, while 5a–5d are soluble in benzene and toluene. Complex 5a forms a tridentate orthopalladated
邻膦亚基-芳烃磺酸盐两性离子1a - 1d,相应的钠盐3a - 3d,甲基(吡啶)钯(II)配合物4a和甲基(4-叔丁基吡啶)钯(II)5a - 5d的合成和表征复杂的报道。配合物4a在芳烃中的溶解度有限,而5a - 5d可溶于苯和甲苯。配合物5a形成三齿正palpalladated物种6a在甲苯中加热至80℃后。在膦亚胺磷原子上引入烷基取代基可延缓原palpalladation,并且(n Bu)3 P官能化的配合物5d在80°C加热24 h后不经历原palpalladation。正钯配合物6a中的Pd–C键对乙烯插入呈惰性。络合物5a - 5d在80°C时不与乙烯反应,分解为Pd 0和两性离子1a - 1d。