Angular (cis-stilbazole) geometry in octahedral dimethyldihalidoplatinum(IV) complexes: potential as metallomesogens and X-ray structure of [PtMe2I2(NC5H4CHCHC6H4OC7H15)2]

The synthesis and characterisation of a series of octahedral dimethyldihalidoplatinum(IV) complexes of 4-alkoxy-4′-stilbazoles with the general formula [PtMe2X2(NC5H4CHCHC6H4OR)2] (X=I or Br, R=n-alkyl) is described. Some of the complexes show mesogenic behaviour. The structure of the complex with X=I and R=C7H15 has been determined by X-ray crystallography, revealing a cis coordination geometry with respect to both the methyl and the substituted 4-alkoxy-4′-stilbazole (n-OST) ligands.