Abstract
AbstractChromium–pyrenylcarbenes accessible from halopyrene precursors undergo benzannulation upon gentle warming with 3‐hexyne to give hydroquinoid benzopyrene–Cr(CO)3 complexes. Kinetic benzannulation product 3 rearranges into thermodynamic haptotropomer 4 at 70 °C in octafluorotoluene under first‐order kinetics. Further complexation of 3 by Cr(NH3)3(CO)3 affords syn and anti dinuclear chromium–benzopyrene complexes. Bidirectional extension of the benzannulation protocol results in the formation of syn and anti dibenzopyrene–dichromium complexes, which are structurally characterized by X‐ray analysis.
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