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• 作者：Subhi A. Al-Jibori^a ; ^{subhi_aljibori@yahoo.com} ; Qusay K.A. Al-Jibori^a ; Harry Schmidt^b ; Kurt Merzweiler^b ; Christoph Wagner^b ; Graeme Hogarth^c ; ^{g.hogarth@ucl.ac.uk}
• 关键词：Palladium ; Pyridine ; Pyrimidine ; Saccharinate ; Thiosaccharinate ; X-ray studies
• 刊名：Inorganica Chimica Acta
• 出版年：2013
• 出版时间：1 June, 2013
• 年：2013
• 卷：402
• 期：Complete
• 页码：69-74
• 全文大小：538 K

文摘

Reactions of Na₂PdCl₄ with two equivalents of 2-aminopyridine (2-ampy), 2-acetylaminopyridine (2-aampy) or 2-acetylaminopyrimidine (2-aampym) afford complexes of the type trans-[PdCl₂L₂]. Further reaction with two equivalents of sodium saccharinate (Nasac) affords mixed-ligand complexes trans-[Pd(sac)₂L₂]. X-ray structures of trans-[Pd(sac)₂(2-ampy)₂] and two solvatomorphs of trans-[Pd(sac)₂(2-aampy)₂].S (S = CHCl₃, thf) have been carried out. In all three, the saccharinate ligands coordinate in a monodentate fashion via the endocyclic amido group and all four ligands lie approximately perpendicular to the PdN₄ plane. In trans-[Pd(sac)₂(2-ampy)₂] the metal ion lies on an inversion centre and consequently the ligands adopt a relative anti/anti-configuration, while in both solvatomorphs of trans-[Pd(sac)₂(2-aampy)₂] they adopt a syn/syn-configuration, the latter possibly resulting from intramolecular hydrogen bonding between the amine protons and the carbonyl oxygen. Reactions of trans-[PdCl₂L₂] with thiosaccharin (tsacH) are dependent upon the nature of the amine. Thus, with trans-[PdCl₂(2-ampy)₂] the desired mixed-ligand complex trans-[Pd(tsac)₂(2-ampy)₂] results, however with acetylamine complexes only the known homoleptic complex, [Pd(tsac)₂], is isolated.