Hydrazinium

Hydrazinium

Structures of hydrazinium [N2H5]+ and hydrazinediium [N2H6]2+.
Names
Other names Ammonia(+1) Dimer,
Identifiers
CAS Number	18500-32-8
3D model (JSmol)	Interactive image
ChEBI	CHEBI:35324
ChemSpider	79101
Gmelin Reference	183
PubChem CID	87681
CompTox Dashboard (EPA)	DTXSID10171699
InChI InChI=1S/H4N2/c1-2/h1-2H2/p+1 Key: OAKJQQAXSVQMHS-UHFFFAOYSA-O
SMILES [NH3+]N
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Hydrazinium is the cation with the formula [N₂H₅]⁺. This cation has a methylamine-like structure ([H₂N−NH₃]⁺). It can be derived from hydrazine by protonation (treatment with a strong acid). Hydrazinium is a weak acid with pK_a = 8.1.

Salts of hydrazinium are common reagents in chemistry and are often used in certain industrial processes.^[1] Notable examples are hydrazinium hydrogensulfate, N₂H₆SO₄ or [N₂H₅]⁺[HSO₄]⁻, and hydrazinium azide, N₅H₅ or [N₂H₅]⁺[N₃]⁻. In the common names of such salts, the cation is often called "hydrazine", as in "hydrazine sulfate" for hydrazinium hydrogensulfate.

The terms "hydrazinium" and "hydrazine" may also be used for the doubly protonated cation [N₂H₆]²⁺, more properly called hydrazinediium or hydrazinium(2+). This cation has an ethane-like structure ([H₃N−NH₃]²⁺). Salts of this cation include hydrazinediium sulfate [N₂H₆]²⁺[SO₄]^2−[2] and hydrazinediium bis(6-carboxypyridazine-3-carboxylate), [N₂H₆]²⁺([C₆H₃N₂O₄]⁻)₂.^[3]

See also

• Ammonium, [NH₄]⁺

References

This page was last edited on 5 February 2024, at 09:56