Cyclic Hydrocarbon Frameworks Containing Two Bismuth Atoms: Towards 9,10‐Dibismaanthracene

Abstract

When bismuth atoms are incorporated into cyclic organic systems, this commonly goes along with strained or distorted molecular geometries, which can be exploited to modulate the physical and chemical properties of these compounds. In sixmembered heterocycles, bismuth atoms are often accompanied by oxygen, sulfur or nitrogen as a second hetero‐element. In this work, we present the first examples of six‐membered rings, in which two CH units are replaced by BiX moieties (X = Cl, Br, I), resulting in dihydroanthracene analogs. Their behavior in chemically reversible reduction reactions is explored, aiming at the generation of dibismaanthracene (bismanthrene). Heterometallic compounds (Bi/Fe, Bi/Mn) are introduced as potential bismanthrene surrogates, as supported by bismanthrene‐transfer to selenium. Analytical techniques used to investigate the reported compounds include NMR spectroscopy, highresolution mass spectrometry, single‐crystal X‐ray diffraction analyses, and DFT calculations.