Synthetic Route 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.
Determining the pi-acceptor properties of n-heterocyclic carbenes by measuring the 77Se NMR chemical shifts of their selenium adducts
A new method for the assessment of the pi-acceptor strength of N-heterocyclic carbenes is presented. The 77Se chemical shifts of the easily available selenium carbene adducts 1¡¤Se-7¡¤Se correlate with the pi-acceptor character of the respective carbenes. The observed delta(77Se) values cover a range of almost 800 ppm, with increasing pi-acidity leading to a downfield shift of the signal.
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Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare