1H, 13C NMR, X‐ray and conformational studies of new 1‐alkyl‐3‐benzoyl‐pyrazole and 1‐alkyl‐3‐benzoyl‐pyrazoline derivatives

The 1H and 13C NMR resonances of 22 1-alkyl-pyrazole and 25 1-alkyl-pyrazoline derivatives were assigned completely using the concerted application of one- and two-dimensional experiments (DEPT, gs-HMQC and gs-HMBC). Nuclear Overhauser enhancement (NOE) effects, conformational analysis and X-ray crystallography confirm the preferred conformation of those compounds. Copyright © 2008 John Wiley & Sons, Ltd.