کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1305999 | 1499195 | 2012 | 7 صفحه PDF | دانلود رایگان |
A series of methoxyphenyl substituted chelated bis-N-heterocyclic carbene palladium(II) complexes has been synthesized and characterized by cyclovoltammetry, spectroscopy (NMR, IR), solid state structures and investigated by quantum chemical calculations. The results confirm that a methoxy functionality in para position at the aryl substituent enhances the donor properties of the ligand compared to a methoxy group in ortho or meta position.
The effect of donor substitution by methoxy groups in 2-, 3-, and 4-position of the chelating phenylsubstituted bis-NHC ligand on the palladium center was investigated in detail by a variety of methods.Figure optionsDownload as PowerPoint slideHighlights
► Synthesis and characterization of new Pd(II) complexes with chelating NHC ligands.
► Synthesis and characterization of imidazoles and bis-imidazolium salts.
► Dependence of donor properties of the methoxy group on its position at the ring.
► CV-, IR-, NMR-data and DFT calculations explain the observed activity differences.
Journal: Inorganica Chimica Acta - Volume 392, 30 September 2012, Pages 204–210