Crystal Structure of Bis(3-amino-1<i>H</i>-pyrazol-2-ium) fumarate—–fumaric acid (1/1) 2C~3~H~6~N~3~^+^\χdotC~4~H~2~O~4~^2-^\χdotC~4~H~4~O~4~, (II). The reaction of 3-amino-1<i>H</i>-pyrazole with a dilute solution of nitric acid in methanol yields an second, orthorhombic polymorph of 3-amino-1<i>H</i>-pyrazol-2-ium nitrate, C~3~H~6~N~3~^+^\χdotNO~3~^-^
| Id | 2243701 |
| Chemical name | Bis(3-amino-1<i>H</i>-pyrazol-2-ium) fumarate—–fumaric acid (1/1) 2C~3~H~6~N~3~^+^\χdotC~4~H~2~O~4~^2-^\χdotC~4~H~4~O~4~, (II). The reaction of 3-amino-1<i>H</i>-pyrazole with a dilute solution of nitric acid in methanol yields an second, orthorhombic polymorph of 3-amino-1<i>H</i>-pyrazol-2-ium nitrate, C~3~H~6~N~3~^+^\χdotNO~3~^-^ |
| a (Å) | 8.5410(4) |
| b (Å) | 14.0507(7) |
| c (Å) | 7.5137(4) |
| α (°) | 90 |
| β (°) | 98.827(6) |
| γ (°) | 90 |
| V (Å3) | 891.02(8) |
| Temperature (K) | 296(2) |
| Rint | 0.0366 |
Publication: Acta Crystallographica Section E (2021) 77, 1 34-41