Figure 1
Crystallization of H2Tnbpz·nH2O as a result of prototropic dismutation of hydrogen bipyrazolates (M = Na). The postulated aggregation of the H(Tnpbz)− anions by extensive mutual NO2/NO2 interactions and hydration of the pyrazole sites are well reflected by the structures of the metastable high hydrates (1) and (2). |