Related Products of 250285-32-6, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.250285-32-6, Name is 1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride, molecular formula is C27H37ClN2. In a patent, introducing its new discovery.
The sigma-donor properties of NHC ligands (NHC = N-heterocyclic carbene) are crucial in controlling their interaction with transition metals, and as a consequence, to determine the selectivity and reactivity of NHCs in transition-metal-catalysis. Herein, we report a simple NMR method for estimating the sigma-donor properties of NHC ligands based on a straightforward 1H NMR measurement of ligand precursors. We present evaluation of sigma-donating properties for a range of NHC ligands varied by structure and electronics that are relevant to transition-metal-catalysis. We expect that the simple measurement of sigma-donating properties of NHCs, together with the known methods for evaluating sterics and pi-backbonding, will enhance the understanding of the properties of NHCs in transition-metal-catalysis.
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