Two 2-D copper(II) azido compounds: catena-poly[di-μ1,1- azido,di-μN,O-(quinolinecarboxylato)(aqua)copper(II)] and 1-D catena-poly[di-μN,N'-(quinoxaline)copper(II)nitrate]
Journal article, 2009
We synthesized three copper(II) complexes with two structurally related polydentate ligands,
quinoline-4-carboxylic acid (quCOOH) and quinoxaline (qux). The structures of these complexes were determined using X-ray single crystal crystallography. Complex 1,
[Cu(quCOO)(N3)(H2O)]n, has a 2-D polymeric structure through di-μ1,1 azido groups forming (Cu2N2) dimeric units and di-μN,O quinoline carboxylate bridging the binuclear copper units.
[Cu(quCOO)(N3)(H2O)]n . 0.87MeOH, (2), has the same structure as 1 in addition to MeOH molecules separating the 2-D sheets of [Cu(quCOO)(N3)(H2O)]n. [Cu(qux)(NO3)2]n, (3), has no
coordinated azido groups, but the quinoxaline is a bidentate bridging ligand giving a 1-D chain,
while the μO,O' chelating nitrato groups stabilize the chain structure by forming a square planar
coordination sphere around copper. IR and UV–Vis spectra of the complexes are in agreement
with the crystal structures.