Structural and magnetic properties of an asymmetric dicopper(II) anticancer drug analogue

Abstract

The single-crystal X-ray structure and variable temperature magnetic properties of the novel dicopper(II) anticancer drug analogue [{Cu₂(HL)(H₂PO₄)₂}₂][NO₃]₂·2H₂O [H₂L = bis(pyridine-2-aldehyde) thiocarbohydrazone] is determined; the complex shows a dimer of dimeric {Cu₂(HL)}³⁺ units with dihydrogenphosphato and sulfur bridges between the inequivalent Cu^II centres, resulting in three antiferromagnetic exchange interactions: a dominant intradimer J of –109 to –116 cm^–1, and two weaker interdimer interactions.