Stable spirocyclic neutral radicals: aluminium and gallium boraamidinates.
Stable dark red (M = Al) or dark green (M = Ga) neutral radicals {[PhB(mu-NtBu)2]2M} are obtained by the oxidation of their corresponding anions with iodine, and EPR spectra supported by DFT calculations show that the spin density is equally delocalized over all four nitrogen atoms in these spiroconjugated systems.
Chivers
Tristram
T
Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4. chivers@ucalgary.ca
Eisler
Dana J
DJ
Fedorchuk
Chantall
C
Schatte
Gabriele
G
Tuononen
Heikki M
HM
Boeré
René T
RT