tetraaza
Tetraaza is a chemical nomenclature prefix used to indicate the presence of four nitrogen atoms in a molecule or substructure. The term combines the Greek-derived prefix tetra-, meaning four, with aza, a standard stem for nitrogen-containing units in inorganic and organic chemistry. It appears in systematic names to signal that a framework contains four nitrogen atoms, often arranged in a macrocyclic or polyamine motif.
A common and well-known example is 1,4,7,10-tetraazacyclododecane, abbreviated cyclen, a 12-membered macrocycle that incorporates four nitrogen
Tetraaza-containing ligands play a prominent role in coordination chemistry and medicinal applications. They form robust complexes
In summary, tetraaza is not a standalone compound but a nomenclatural element signaling four nitrogen atoms