The N-15 cross-polarization magic-angle spinning nuclear magnetic reso
nance (CP-MAS NMR) spectra of 5-aminotetrazole monohydrate were measur
ed in the solid state and compared with the data obtained in solutions
. The results confirmed the structure of 5-aminotetrazole with a hydro
gen atom attached to the N1 atom with a contribution of all the other
nitrogen atoms in the H-bonded system. It is in agreement with the X-r
ay crystallographic data.