New functionalised C,C-bipyrazoles. Synthesis and cation binding properties

The synthesis of two new C,C-bipyrazoles ligands with a side-arm bearing a functionalised donor-group is reported. The complexation properties of these compounds towards bivalent metal ions (Hg 2+ , Cd 2+ , Pb 2+ , Cu 2+ , Zn 2+ ) and alkaline metal ions (Li + , Na + , K + ) was studied by a liquid–liquid extraction process and the extracted cation percentage was determined by atomic absorption measurements.