Related Experiment Video
Updated: Dec 25, 2025

Synthesis of a Water-soluble Metal–Organic Complex Array
Published on: October 8, 2016
Supramolecular Assembly of Metal Complexes by (Aryl)I⋅⋅⋅d [PtII ] Halogen Bonds
Eugene A Katlenok1, Matti Haukka2, Oleg V Levin1
1Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034, Saint Petersburg, Russian Federation.
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 [PtII ] XBs between iodine σ-holes and lone pairs of the positively charged (PtII )2 centers acting as nucleophilic sites. The polymer includes a curved linear chain ⋅⋅⋅Pt2 ⋅⋅⋅I(areneF )I⋅⋅⋅Pt2 ⋅⋅⋅ involving XB between iodine atoms of the perfluoroarene linkers and (PtII )2 moieties. The 195 Pt NMR, UV/Vis, and CV studies indicate that XB is preserved in CH(D)2 Cl2 solutions.
More Related Videos
Related Concept Videos
Valence Bond Theory
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Complexation Equilibria: Factors Influencing Stability of Complexes
Electrophilic Addition to Alkynes: Halogenation
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
Formation of Complex Ions
Complexation Equilibria: The Chelate Effect

