NITROPYRAZOLES .9. PARAMETERS OF THE H-1, C-13, AND N-15 (N-14) SPECTRA AND THE STRUCTURES OF N-AMINONITROPYRAZOLES

The structures of substituted N-aminonitiopyrazoles and 1- and 2-amino -4-nitro-1,2,3-triazoles as well as the site of protonation of 1-amino pyrazole were determined based on the H-1, C-13, and N-15 (N-14) NMR s pectra. The C-13 NMR spectra were recorded under conditions of C-13-(H -1,N-14) triple resonance. Effects of substituents in the pyrazole rin g on the C-13 and N-14 chemical shifts were studied. The C-13,H-1 and N-15,H-1 spin-spin coupling constants, obtained using techniques of [H -1]-->C-13 and [H-1]-->N-15 polarization transfer (SPT, INEPT), were m easured, fully assigned, and discussed.