New hydroxylamine-containing macrobicyclic encapsulating ligand: Unexpected double addition of ethyl radicals to the azomethine fragment of a boron-capped iron(II) clathrochelate dioximate

The reaction of the mixed dimethylglyoximate-α-benzyldioximate iron(II) clathrochelate with (C2H5)3B-O2 system as “soft” radical source afforded the major macrobicyclic product of reductive addition of two carbon-centered radicals containing both the oxime and hydroxylamine donor groups. This cage complex of new encapsulating ligand was characterized by XRD and solution NMR.