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

In this article, we describe the synthesis of polyaromatic heteropines including main group element (Phosphorus, Germanium) through Ni or Cu‐mediated C−C coupling. Coordination complexes were synthesized with the σ3,λ3‐phosphepines using different metal ions (Au(I), Re(I), Pd(II)) showing that these P‐heterocycles display the classical reactivity of two‐electrons P‐donor making them promising ligands. The optical properties were experimentally studied (UV‐vis absorption and emission) and compared. Finally, both polyaromatic germepine and phosphepine appear as interesting building blocks for optoelectronics. [ABSTRACT FROM AUTHOR]