Bis(6-diphenylphosphinoacenaphth-5-yl)telluride as a ligand toward coinage metal chlorides

Abstract

The use of bis(6-diphenylphosphinoacenaphth-5-yl)tellurium (6-Ph₂P-Ace-5-)₂Te (6) as a ligand for complex formation reactions with CuCl and AgCl is reported, giving rise to the formation of 1 : 1 complexes (6-Ph₂P-Ace-5-)₂Te·CuCl (7) and (6-Ph₂P-Ace-5-)₂Te·AgCl (8). The reaction of 6 with (tht)AuCl or (CO)AuCl failed to provide the analogous complex (6-Ph₂P-Ace-5-)₂Te·AuCl (9), but gave the recently reported (6-diphenylphosphinoacenaphth-5-yl)gold dimer (6-Ph₂P-Ace-5-Au)₂ (10) and (6-diphenylphosphinoacenaphth-5-yl)tellurenyl chloride, (6-Ph₂P-Ace-5-Te)Cl (11). The reaction of 6, 7 and 8 with PhICl₂ provided diarylchlorotelluronium chloride [(6-Ph₂P-Ace-5-)₂TeCl]Cl (12). Compounds 7, 8 and 12 were characterized by multinuclear NMR spectroscopy and single-crystal X-ray crystallography. DFT computations of 6, 7, 8, [(6-Ph₂P-Ace-5-)₂TeCl]⁺ (12′) and [(8-Me₂N-Nap-1-)₂TeCl]⁺ (13′) were carried out including a variety of real-space bonding indicators (RSBI) derived from the Atom-In-Molecules (AIM) and the Electron Localizability Indicator (ELI-D) space partitioning schemes. Furthermore, the non-covalent interaction (NCI) index was applied to examine the nature of the Te–X interactions (X = Cu, Ag, P, N, Cl) and complement the AIM and ELI-D approaches.