Mixed-ligand complexes with 2,6-pyridinedicarboxylato(2-) and 4,7-diphenyl-1,10-phenanthroline ligands, [M-II(pdc)(DPphen)(H2O)].H2O (M = Co or Cu). Synthesis, crystal structures and properties

作者：Brandi Blanco MP; Choquesillo Lazarte D; Gonzalez Perez JM; Castineiras A; Niclos Gutierrez J^*

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2005, 631(11): 2081-2085.

DOI：10.1002/zaac.200570018

• copper
• cobalt
• dipicolinic acid
• phenanthroline
• crystal structure

Iso-type [M-II(pdc)(DPphen)(H2O]center dot H2O compounds (M = Co or Cu, pdc = 2,6-pyridinedicarboxylato(2-) ligand and DPphen = 4,7-diphenyl-1,10-phenanthroline) were synthesized and studied by X-ray diffraction, thermal and spectral methods. The N,N'-equatorial bidentate DPphen-copper(II) chelation imposes a mer-N(equatorial)+O-2(apical) conformation to pdc in the coordination polyhedron (type 4+1+1). In the Co(II) derivative, the coordination is of type 1+2+2+1 because of a lesser Jahn-Teller distortion. In the crystals, pi,pi-interligand interactions between phen ligands connect the complex molecules in multi-stacked chains. Aqua(...)O(carboxyl) H-bonding interactions reinforce the stacked chains and build double chains in ID supramolecular structures parallel to the a axis. Non coordinated water connect these structures by H-bonds.

• 出版日期2005