Electrostatic repulsion between the cations of (1-methyl-1H-imidazole-κN3)(2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)platinum(II) perchlorate nitro­methane monosolvate prevents Pt⋯Pt inter­actions

Abstract

The reaction between [Pt(terpy)Cl]·2H2O (terpy = 2′,2′′:6′,2′′-terpyridine) and 1-methyl­imidazole (MIm) in the presence of two equivalents of AgClO4 in nitro­methane yields the title compound, [Pt(C15H11N3)(C4H6N2)](ClO4)2·CH3NO2. The dicationic complexes are arranged in a staggered configuration. The torsion angle subtended by the 1-methyl­imidazole ring relative to the terpyridine ring is 114.9 (5)°. Inter­molecular C—H⋯O inter­actions between the perchlorate anions and the H atoms of the terpy ligand are observed. Consideration of related phenyl­bipyridyl complexes of platinum(II), which are monocationic, leads to the conclusion that the electrostatic repulsion between the dicationic chelates prevents the formation of Pt⋯Pt inter­actions. These inter­actions are a common feature associated with the monocationic species.