Dimeric cyclopalladated azobenzenes: structural differences between 2-hydroxypyridine and 2-mercaptopyridine bridged complexes

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• 作者：Maity ; Subrata ; Roy ; Ramkrishna ; Sinha ; Chittaranjan ; Sheen ; Wen-Jyh ; Panneerselvam ; Kaliyamoorthy ; et. al.
• 关键词：Cyclopalladated azobenzenes ; 2-Hydroxypyridine ; 2-Mercaptopyridine ; Bridged binuclear ; X-ray structure ; Electrochemistry
• 刊名：Journal of Organometallic Chemistry
• 出版年：2002
• 出版时间：May 1, 2002
• 年：2002
• 卷：650
• 期：1-2
• 页码：202-209
• 全文大小：189 K

文摘

Binuclear chloro-bridged cyclopalladated azobenzenes [Pd(A)Cl]₂ (A=ortho-metallated azobenzene or its derivatives) have been reacted with aqueous (aq.) AgNO₃ followed by the addition of 2-hydroxypyridine (2-PyOH; donor centres of deprotonated form abbreviated N,O)/2-mercaptopyridine (2-PySH; donor centres of deprotonated form abbreviated N,S) in presence of Et₃N to synthesise bridged dinuclear compound [Pd(A)(μ-N,O)]₂–[Pd(A)(μ-N,S)]₂. The compositions of the complexes have been established by elemental analyses, IR, UV–vis, ¹H and ¹³C-NMR spectral data. The structural confirmation has been carried out by X-ray crystallography. The structures show anti-symmetric metallacycle in the dimer and N,O/N,S bridging arrangement. The dimer [Pd(A₁)(μ-N,X)]₂ shows strong PdPd interaction (A₁