Mechanistic studies on the Pd–Cl cleavage of dichloro-[1-alkyl-2-(naphthylazo)imidazole]palladium(II) complexes by 8-quinolinol
作者： Pradip Kumar Ghosh , Sushanta Saha , Ambikesh Mahapatra
DOI: 10.1016/J.POLY.2007.01.022
关键词: Imidazole 、 Metal 、 Palladium 、 Medicinal chemistry 、 Chemical kinetics 、 Alkyl 、 Chemistry 、 Reaction rate 、 Reaction rate constant 、 Acetonitrile 、 Inorganic chemistry
摘要: Abstract 8-Quinolinol (HQ) reacts with [Pd(α-/β-NaiR)Cl 2 ] [α-/β-NaiR = 1-alkyl-2-(naphthyl-α-/β-azo)imidazole] in acetonitrile (MeCN) solution to give [Pd(α-/β-NaiR)(Q)](ClO 4 ). The products are characterized by spectroscopic techniques (FT-IR, UV–Vis, NMR). reaction kinetics show a first order dependence of rate on each the concentration metal complex and HQ. Addition LiCl retarded has proved cleavage Pd–Cl bond as rate-determining step. Thermodynamic parameters (Δ ‡ H ∘ Δ S ) determined from variable temperature kinetic studies. magnitude second constant, k , increases order: Pd(NaiEt)Cl well Pd(β-NaiR)Cl .
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