Iodo bridged lead(II) compounds of azoimidazoles: Single crystal X-ray structures of [di-iodo-{1-methyl-2-(p-tolylazo)imidazole}lead(II)]n and {1-methyl-3-benzyl-2-(p-tolylazo)imidazolium}m-{tri-iodoplumbate(II)}m

PbI2 forms iodo-bridged neutral polymer upon reaction with 1-alkyl-2-(arylazo)imidazoles (RaaiR′). The reaction of PbI2 and dialkyl imidazolium iodides [RaaiR′R″]+I− has synthesized {1,3-dialkyl-2-(arylazo)imidazolium}m-{tri-iodoplumbate(II)}m. The complexes are characterized by different spectroscopic studies. Iodobridged chelated polymer, [Pb(RaaiR′)I2]n, has been established by single crystal X-ray diffraction measurements in one case. Tri-iodoplumbates form iodo bridged anion polymer, which connects [RaaiR′R″]+ by hydrogen bonding and are placed in between the pillars of [Pb(μ-I)6]n motif.

Graphical abstractDi-iodo-Pb(II)-arylazoimidazole gives iodo bridged 1-D neutral chain. 1,3-Di-alkyl-2- (arylazo)imidazolium tri-iodoplumbate is an anion polymer generated by iodo bridging in tri-iodoplumbate where arylazoimidazolium cation is intercalated by hydrogen bonding and π⋯π forces.Figure optionsDownload full-size imageDownload as PowerPoint slide