Low temperature protonation of cyclo-octa-1,5-diene-(duroquinone)nickel(0)

Abstract

Cyclo-octa-1,5-diene(duroquinone)nickel(O) has been shown to protonate at the duroquinone carbonyls in HSO₃F to yield a stable dication. The chemical shift of the OH protons indicates very extensive positive charge delocalization through backbonding.