Conversely, most arylnitrenium ions are ground state singlets. Certain substituted arylnitrenium ions can be ground state triplets, however. Nitrenium ions can have microsecond or longer lifetimes in water.
On the other hand, most arylnitrenium ions exist in their ground state as singlets. Certain substituted arylnitrenium ions can also be found in their ground state as triplets. Nitrenium ions may exhibit lifetimes of microseconds or even longer when dissolved in water.