Reshaping aromatic frameworks: expansion of aromatic system drives metallabenzenoids to metallapentalenes

Abstract

Reshaping an aromatic framework to generate other skeletons is a challenging issue due to the stabilization energy of aromaticity. Such reconfigurations of aromatics commonly generate non-aromatic products and scarcely reshape...

Preparation and Aromaticity of Rhenacycloprop-2-ene-containing Polycyclic Compounds

“…Aromaticity study of metallacycloprop-1-ene complexes has been reported recently, − and they show mainly σ-aromaticity. Such work on metallacycloprop-2-ene complexes is less developed though η 2 -alkyne complexes have been widely studied. ,− Since many fused metallacycloprop-1-enes are aromatic, − herein we present the synthesis and characterization of fused five- and six-membered oxa-rhenacycles with a metallacycloprop-2-ene unit, as well as their aromaticity investigation.…”