An overview of the synthesis and structures lead(II) and mercury(II) complexes with diamine-based bis-pyridine Schiff base ligands

[Display omitted] •Lead(II) and mercury(II) complexes.•Diamine-based bis-pyridine Schiff base ligands.•Different synthetic routes and structures. Different synthetic routes and structures of several lead(II) and mercury(II) complexes with diamine-based bis-pyridine Schiff base ligands have been discussed in this review. The applications of the complexes have also been included. It is noteworthy that only those complexes are considered in this review whose X-ray structures are available.