کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1324866 | 977358 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Co-ligand effects in the catalytic activity of Pd(II)–NHC complexes Co-ligand effects in the catalytic activity of Pd(II)–NHC complexes](/preview/png/1324866.png)
Three cis-chelating di-N-heterocyclic carbene palladium(II) complexes [PdX2(diNHC)] (X = I, 1; X = SCN, 2; X = CF3CO2, 3) bearing different anionic co-ligands were synthesized and fully characterized. A comparison of their catalytic activities in the Mizoroki–Heck reaction and conjugate addition of arylboronic acids to cyclic enones revealed increasing efficiency in the order SCN− < I− < CF3CO2−. The di(trifluoroacetato) complex 3 showed the best activity in both transformations highlighting the importance of co-ligands effects in catalysis. In addition, the molecular structure of an unusual poly-heteronuclear complex salt 4 is reported, which has been isolated as a byproduct in the synthesis of complex 3.
Three cis-chelating diNHC Pd(II) complexes with different anionic co-ligands 1–3 were synthesized and fully characterized. A comparison of their catalytic activities in the Mizoroki–Heck reaction and conjugate addition of arylboronic acids to cyclic enones revealed increasing efficiency in the order SCN− < I− < CF3CO2− highlighting the importance of co-ligands effects in catalysis. The molecular structure of an unusual poly-heteronuclear complex salt 4 is also reported, which has been isolated as a byproduct in the synthesis of 3. Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 696, Issue 1, 1 January 2011, Pages 112–117