Thus, photostimulated single electron transfer in CTC followed by expelling chloride ion leads to a biradical, which couples intramolecularly.
所以，光诱导的单电子转移和随后的氯离子离去导致双游离基，双游离基分子内偶合成环。
2
And what I want to point out that we just figured out for molecular orbital theory, is that o 2 is a biradical, because remember, the definition of a radical is when we have an unpaired electron.