Supramolecular Assembly of Metal Complexes by (Aryl)I⋅⋅⋅d[Pt<sup>II</sup>] Halogen Bonds
Eugene A. Katlenok, Matti Haukka, Oleg V. Levin, Antonio Frontera, Vadim Yu. Kukushkin
Abstract
Abstract The theoretical data for the half‐lantern complexes [{Pt( )(μ‐ )} 2 ] [ 1 – 3 ; is cyclometalated 2‐Ph‐benzothiazole; is 2‐SH‐pyridine ( 1 ), 2‐SH‐benzoxazole ( 2 ), 2‐SH‐tetrafluorobenzothiazole ( 3 )] indicate that the Pt ⋅⋅⋅ Pt orbital interaction increases the nucleophilicity of the outer d orbitals to provide assembly with electrophilic species. Complexes 1 – 3 were co‐crystallized with bifunctional halogen bonding (XB) donors to give adducts ( 1 – 3 ) 2 ⋅ (1,4‐diiodotetrafluorobenzene) and infinite polymeric [ 1⋅ 1,1′‐diiodoperfluorodiphenyl] n . X‐ray crystallography revealed that the supramolecular assembly is achieved through (Aryl)I ⋅⋅⋅ d [Pt II ] XBs between iodine σ‐holes and lone pairs of the positively charged (Pt II ) 2 centers acting as nucleophilic sites. The polymer includes a curved linear chain ⋅⋅⋅ Pt 2 ⋅⋅⋅ I(arene F )I ⋅⋅⋅ Pt 2 ⋅⋅⋅ involving XB between iodine atoms of the perfluoroarene linkers and (Pt II ) 2 moieties. The 195 Pt NMR, UV/Vis, and CV studies indicate that XB is preserved in CH(D) 2 Cl 2 solutions.