Mixing Polyaromatic Scaffolds and Main Group Elements: Synthesis, Coordination and Optical Properties of Naphthyl‐Fused Heteropines

Polyaromatic 7-membered rings featuring main group elements (P, Ge) are described. Coordination complexes were synthesized with the trivalent phosphepines highlighting that these P-heterocycles are promising ligands. Furthermore, those polyaromatic germepines and phosphepines appear as interesting building blocks for optoelectronics.