کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1327390 | 977479 | 2005 | 8 صفحه PDF | دانلود رایگان |

Via NMR-spectroscopy the relative reactivity of N-heterocyclic silylenes (NHSi) and carbenes (NHC) was studied. Reaction of sterically crowded bis-N-heterocyclic Pd(0) carbene complexes with free N-heterocyclic silylenes led to complete displacement of the N-heterocyclic carbene, which is unexpected knowing that usually a silylene is a weaker bound ligand compared to a carbene. High-level DFT calculations on a small model system and the experimentally used complexes confirm the experimental findings and indicate that steric interactions play an important role in the substitution reaction.
An unexpected replacement of N-heterocyclic carbenes by N-heterocyclic silylenes was observed by NMR at a Pd(0) complex. The reaction was studied by DFT calculations to elucidate the bonding properties of N-heterocyclic ligands and the role of the steric bulk of the N-substituent.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 690, Issue 13, 1 July 2005, Pages 3292–3299