Synthesis and crystal structure of (1,8-naphthyridine-κ2N,N′)[2-(1H-pyrazol-1-yl)phenyl-κ2N2,C1]iridium(III) hexafluoridophosphate dichloromethane monosolvate

Abstract

The solvated title salt, [Ir(C9H7N2)2(C8H6N2)]PF6·CH2Cl2, was obtained from the reaction between 1,8-naphthyridine (NAP) and an orthometalated iridium(III) precursor containing a 1-phenylpyrazole (ppz) ligand. The asymmetric unit comprises one [Ir(ppz)2(NAP)]+ cation, one PF6− counter-ion and one CH2Cl2 solvent molecule. The central IrIII atom of the [Ir(ppz)2(NAP)]+ cation is distorted-octahedrally coordinated by four N atoms and two C atoms, whereby two N atoms stem from the NAP ligand while the ppz ligands ligate through one N and one C atom each. In the crystal, the [Ir(ppz)2(NAP)]+ cations and PF6− counter-ions are connected with each other through weak intermolecular C—H...F hydrogen bonds. Together with an additional C—H...F interaction involving the solvent molecule, a three-dimensional network structure is formed.

Keywords

• crystal structure
• cyclometalated iridium complex
• 1-phenylpyrazole
• c—h...f hydrogen bonds