= Singlet oxygen
{wiki=Singlet_oxygen}
Singlet oxygen refers to an excited state of molecular oxygen (O₂) that has higher energy than its ground state. In its ground state (triplet oxygen), the two unpaired electrons have parallel spins, while in singlet oxygen, the spins of the two electrons are paired, resulting in a different electronic configuration. This configuration makes singlet oxygen highly reactive and capable of participating in various chemical reactions, particularly in biological and photochemical processes.
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