Self-Assembly by Tridentate or Bidentate Ligand: Synthesis and Vapor Adsorption Properties of Cu(II), Zn(II), Hg(II) and Cd(II) Complexes Derived from a Bis(pyridylhydrazone) Compound

Four complexes, [Cu4L2(OCH3)(2)(CH3OH)(2)]center dot 2H(2)O (1), [Zn2L2Cl4]center dot 2H(2)O center dot 2CH(3)OH (2), [Hg2L2Br4]center dot 4CH(3)OH (3), and {[CdL2Cl2]center dot 4H(2)O center dot 4CH(3)OH}(n) (4), have been synthesized and characterized from a bis(pyridylhydrazone) ligand (L) with copper(II), zinc(II), mercury(II) or cadmium(II), respectively. Complex 1 exists as a centrosymmetric tetranuclear dimer with L as deprotonated tridentate ligand. Complexes 2 and 3 exist as centrosymmetric metallamacrocycles with L as bidentate ligand. Complex 4 exists as a 1D looped-chain coordination polymer. The thermal stabilities and vapor adsorption properties of the four complexes were investigated as well.

Automated summary

Four complexes were synthesized and characterized from a bis(pyridylhydrazone) ligand with copper(II), zinc(II), mercury(II) or cadmium(II), respectively, and their structures and properties were investigated.