2,2':6',2''-Terpyridine(1-methylimidazole-N3)platinum(II) Perchlorate Acetonitrile Solvate

Abstract

The title compound, [Pt(CIsHI1N3)(C4H6N2)](C104)2.-C2H3N, is formed by reaction of chloro-2,2':6t,2"-terpyridineplatinum(II) chloride dihydrate with 1-methylimidazole in the presence of excess amounts of NaCIO4. The platinum center is approximately squareplanar Na-coordinated to the tridentate terpyridine and monodentate 1-methylimidazole with Pt--N 1.943 (7)-2.026 (7)~,. The imidazole ring forms a dihedral angle of 66.5 (2) ° with the planar Pt-terpyridine ring system. The crystal packing is dominated by 7r-Tr stacking interactions with the absence of any short metal...metal interactions.

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

“…The MIm ligand is canted relative to the Pt(terpy) unit. The torsion angle defined by C(16)-N(4)-Pt-N(1) is 114.9 (5)°.This angle is equivalent to that reported by Roszak et al, 1996. The same torsion angle reported by Müller et al, 2007, is 107.2 (7)°. These data suggest that the identity of the solvent in the lattice is inconsequential in terms of its effect on the torsion angle of the ancillary ligand, but show that the presence The crystal packing shows there to be no classical hydrogen bonding, however, there are unconventional hydrogen bonds between the perchlorate anions and the hydrogen atoms of the terpy ligand.…”

“…For synthesis of the parent complex, chloro(2,2 0 :6 0 ,2"-terpyridine)platinum(II)chloride dihydrate, [Pt(terpy)Cl]ClÁ-2H 2 O, see: Pitteri et al (1995). For the structure of the acetonitrile solvate of the title Pt(II) chelate, see: Roszak et al (1996) and for a structure, which was devoid of solvent in the lattice, see: Mü ller et al (2007). For studies of the luminescent properties and intermolecular PtÁ Á ÁPt interactions of related compounds, see: Field et al (2007).…”

“…Two variants of the title cation have been reported. Firstly, with an acetonitrile molecule in the lattice (Roszak et al, 1996) and secondly, a structure, which was devoid of solvent in the lattice (Müller et al, 2007). The title compound has a nitromethane molecule in the asymmetric unit.…”

Metal Ion Effects in Isotopic Hydrogen Exchange in Biologically Important Heterocycles

“…The difficulties pointed out above are avoided by the synthesis, isolation, and characterization of substitution-inert 24 complexes; exchange studies are then undertaken on the ligand portion of the isolated complexes under optimized experimental conditions, ensuring the identity of the reacting species. Typical transition metal ions studied by this method include Co(III), , Cr(III), − and Pt(II). − Pt(II)−biomolecule complexes are strategic in bioinorganic chemistry for their chemotherapeutic potential in cancer treatment; , we have recently reported − a number of new platinum complexes of biomolecules.…”

Incorporation of Transition-Metal Complexes in Functionalized Mesoporous Silica and Their Activity toward the Oxidation of Aromatic Amines

“…The transition-metal−amine complexes are of special interest because they show activity against cisplatin (antitumor drug)-resistant cell lines − and the ability to form dioxygen adducts reversibly, which can be used in biologically active reactions. The intramolecular oxidation of amines to imines by metal ions coordinated to amines has been reported with iron, , copper, nickel, , ruthenium, , and platinum .…”