to the singly occupied orbital of the HM1 +• species. This electron transfer occurs due to the LEF of the cage that drives an electron from TLN to HM1. A complete mechanism of the reaction is depicted in Figure . As can be seen, the reaction begins with a single electron transfer from the electron-rich TLN substrate to HM1, to yield the RC, followed by a hydrogen transfer to the oxo-iron complex, and finally, the TLN-cation rebounds on the hydroxo-iron complex and yields the Tetralol product. .