Magnetic Resonance in Chemistry p. 90 - 92 (1990)
Update date:2022-08-05
Topics:
Babbitt, George E.
Lynch, Michael P.
Beck, James R.
A compilation of 13C NMR chemical shifts for 13 pairs of 3- and 5-cyano-substituted pyrazole regioisomers is reported.All of the ring carbon and cyano carbon 13C chemical shifts show a regular, predictable correlation with the particular isomer, whether 3-cyano or 5-cyano.These shifts occured in very narrow ranges, precluding any confusion of assignment within the group of compounds studied.X-ray crystallographic analysis was performed on one of the samples.
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