Orthonitrate
Encyclopedia
The orthonitrate ion is NO43−. It is only known in two compounds, Na3NO4 and K3NO4 which were prepared by fusion of the nitrate and oxide, e.g.
The orthonitrate ion is tetrahedral and the N-O bond length is 139 pm which compares with the sum of the covalent radii
of 137 pm and with the bond lengths in nitrates (range 122-127 pm)and nitrites (range 113-123 pm) where there is double bonding.
- NaNO3 + Na2O = Na3NO4
The orthonitrate ion is tetrahedral and the N-O bond length is 139 pm which compares with the sum of the covalent radii
Covalent radius
The covalent radius, rcov, is a measure of the size of an atom that forms part of one covalent bond. It is usually measured either in picometres or angstroms , with 1 Å = 100 pm....
of 137 pm and with the bond lengths in nitrates (range 122-127 pm)and nitrites (range 113-123 pm) where there is double bonding.
Other nitrogen oxoanions
Other nitrogen oxoanions include:- nitrateNitrateThe nitrate ion is a polyatomic ion with the molecular formula NO and a molecular mass of 62.0049 g/mol. It is the conjugate base of nitric acid, consisting of one central nitrogen atom surrounded by three identically-bonded oxygen atoms in a trigonal planar arrangement. The nitrate ion carries a...
, NO3− - nitriteNitriteThe nitrite ion has the chemical formula NO2−. The anion is symmetric with equal N-O bond lengths and a O-N-O bond angle of ca. 120°. On protonation the unstable weak acid nitrous acid is produced. Nitrite can be oxidised or reduced, with product somewhat dependent on the oxidizing/reducing agent...
, NO2− - peroxonitritePeroxynitritePeroxynitrite is the anion with the formula ONOO−. It is an unstable structural isomer of nitrate, NO3−, which has the same formula but a different structure. Although peroxynitrous acid is highly reactive, its conjugate base peroxynitrite is stable in basic solution...
, (peroxynitrite), OONO− - trioxodinitrate, (hyponitrate), [ON=NO2]2−
- nitroxylate, [O2N−NO2]4−