The hyponitrous acid is a chemical compound and an isomer of nitramide. The property value of hydrogen bond donor and hydrogen bond acceptor are 2 and 4 respectively. It is also known as a hyponitrous acid dimer.
There are two series of salts for hyponitrous acid and they are hyponitrites with [ON=NO]2− anion and acid hyponitrites with [HON=NO]−. The property value of hydrogen bond donor and hydrogen bond acceptor is 2 and 4 respectively. Hyponitrous acid is synthesised from silver (I) hyponitrite and anhydrous HCl in the ether.
Following is the table of formulas of hyponitrous acid:
| Molecular formula | H2N2O2 |
| Linear formula | HON=NOH |
| Simplified molecular-input line-entry system (SMILES) | N(=NO)O |
Structure Of Hyponitrous Acid
Trans and cis are the two possible structures of hyponitrous acid. White crystals are obtained from trans-hyponitrous which are explosive when dry and it is a weak acid which decomposes to nitrous oxide when in aqueous solution. Sodium salt can be obtained from cis acid.
Properties Of Hyponitrous Acid
| IUPAC name | (E)-dihydroxydiazene |
| Chemical formula | H2N2O2 or HON=NOH |
| Molecular weight | 62.028 g/mol |
| Conjugate base | Hyponitrite |
Safety Measure
- It is an explosive in the dry form.
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