Synthesis and Structure of Trimethylplatinum(IV) Iodide Complex of 4'‐(4‐Methoxyphenyl)‐2,2':6',2''‐terpyridine Ligand and its Halogen Bonding Property

The synthesis and structural characterization of a new trimethylplatinum(IV) iodide complex of 4'‐(4‐methoxyphenyl)‐2,2':6',2''‐terpyridine ligand L, {PtMe3IL} (1) is reported. The X‐ray crystal structure shows that the terpyridine ligand L binds the platinum(IV) metal center in bidentate fashion, which is well supported by the 1H NMR spectrum of 1. The complex 1 upon crystallization with 1,4‐diiodotetrafluorobenzene (DITFB) forms the halogen bonded complex 1a (1·DITFB). The structural investigation shows that 1a exhibits the halogen bonding interaction in which the non‐coordinated pyridyl nitrogen acts as halogen bond acceptors by forming I···N interaction with iodine atom of DITFB. In addition iodine atom of complex 1 also acts as weak halogen bond acceptor.