Reaction of hydrazinium azide with sulfuric acid: The X-ray structure of [N2H6][SO4]

The Forgotten Polymorphism of Hydrazine Sulfate: Crystal Structure of the Metastable Monoclinic Form II

“…Both, form II and form I, [8] show similarities in the secondary building motifs as zigzag shaped strands of [SO 4 ] 2-ions run along the a axes. Within these strands (Figure 3a [8] For a brief description of the hydrogen bond networks, we focus on the shortest two-centered hydrogen bonds and weaker multifurcated hydrogen bonds are neglected for reasons of clarity.…”

“…Details on two-centered hydrogen bonds in form II of hydrazine sulfate. Details of form I [8] are reported for comparison. Values for form I [8] were generated with Diamond 4.4 [17] .…”

“…Further details of the data collection and structure refinement are given in Table 1. Figure 2 shows the ORTEP plot of the asymmetric unit of hydrazine sulfate form II (Figure 2a) including the numbering scheme in comparison to the asymmetric unit of form I [8] ( Figure 2b). The molecular packing of form II is shown in Figure 3a and b and is compared to the packing of form I [8] ( Figure 3c and d).…”

“…Within these strands (Figure 3a [8] For a brief description of the hydrogen bond networks, we focus on the shortest two-centered hydrogen bonds and weaker multifurcated hydrogen bonds are neglected for reasons of clarity. Details on the discussed hydrogen bonds are summarized in Table 2 along with the color code used in Figure 4.…”

“…[7] Another more recent structural study on form I dates back to 1996 by Klapötke et.al. [8] The first report on a metastable monoclinic form ( 2+ ions. The spatial orientation is, however, different in both forms.…”