Nitric triplet state energy

Nitric oxide is the simplest stable molecule with an odd number of electrons. Because of its unpaired electron, it is paramagnetic at room temperature (the lowest lying energy level, X2U/z, is diamagnetic), ionizes relatively easily, and is highly reactive with other paramagnetic species, such as NOz and Oa. It is an efficient scavenger of free radicals and triplet states and has been used frequently for this purpose in photochemical and thermal studies. 

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