STRUCTURAL AND MAGNETIC-PROPERTIES OF AN ASYMMETRIC DICOPPER(II) ANTICANCER DRUG ANALOG

The single-crystal X-ray structure and variable temperature magnetic p roperties of the novel dicopper(II) anticancer drug analogue [{Cu-2(HL )(H2PO4)(2)}(2)][NO3](2) . 2H(2)O [H2L = bis(pyridine-2-aldehyde) thio carbohydrazone] is determined; the complex shows a dimer of dimeric {C u-2(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.