THE PREPARATION AND CRYSTAL-STRUCTURES OF CU(HDPA)(CHP)(2) AND A NEW PHASE OF CU(DPA)2 [HDPA=2-(PYRIDYL-2-AMINO)-PYRIDINE, HCHP=6-CHLORO-2-HYDROXYPYRIDINE]

The synthesis and crystal structure of Cu(Hdpa)(chp)(2) (I) are reported. The copper environment is six coordinate with Hdpa and one of the chp ligands bonding in a chelating fashion. The second pyridine is bound through N, the O atom takes up the sixth coordination site but is also hydrogen bonded to the Hdpa ligand of a second Cu(Hdpa)(chp)(2) unit, forming a centrosymmetric dimer. A new (orthorhombic) phase of Cu(dpa)(2) (II) has also been found, in which distorted tetrahedral copper(II) complexes are linked through a network of H bonds between the deprotonated dpa ligand and C-H bonds meta- to the pyridyl nitrogen donor.