Abstract
The review covers the use of chemical shifts, isotope effects on chemical shifts and coupling constants in the description of Schiff bases. o-Hydroxy Schiff bases are often tautomeric and special attention is devoted to this feature. Nuclei in question are 1H, 13C, 15N, 19F and 17O. As well primary as secondary isotope effects are treated. Deuterium isotope effects on 13C and 15N chemical shifts are treated in detail and the theoretical background is dealt with. Finally, various applications of Schiff bases in biology and stereochemistry are discussed.
Keywords: spectroscopy, NMR, Hydroxy Schiff Bases, chemical shifts, stereochemistry
Call for Papers in Thematic Issues
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
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