Phenyldiquinolinylarsine as a Nitrogen‐Arsenic‐Nitrogen Pincer Ligand

A nitrogen-arsenic-nitrogen (NAN) ligand, phenyldiquinolinylarsine (pdqa), was newly synthesized by utilizing diiodophenylarsine as a key precursor. The copper(I) halide (CuX, X = Cl, Br, I) and gold(I) chloride (AuCl) complexes ofpdqawere synthesized and their structures were analyzed by NMR spectroscopy and X-ray crystallography. [CuX(pdqa)] formed pincer complexes, while only the arsenic atom coordinated to the Au(I)ion in [AuCl(pdqa)]. Moreover, it was found that steric strain for forming the pincer coordination was relieved around the arsenic atom, which had less directional coordination, when comparing the structure of a CuI complex with bidentate ligand diphenylquinolinylarsine.