Methylresorcinarene: a reaction vessel to control the coordination geometry of copper(II) in pyridine N-oxide copper(II) complexes.
Pyridine and 2-picolinic acid N-oxides form 2 : 2 and 2 : 1 ligand : metal (L : M) discrete L2M2 and polymeric complexes with CuCl2 and Cu(NO3)2, respectively, with copper(ii) salts. The N-oxides also form 1 : 1 host-guest complexes with methylresorcinarene. In combination, the three components form a unique 2 : 2 : 1 host-ligand-metal complex. The methylresorcinarene acts as a reaction vessel/protecting group to control the coordination of copper(ii) from cis-see-saw to trans-square planar, and from octahedral to square planar coordination geometry. These processes were studied in solution and in the solid state via(1)H NMR spectroscopy and single crystal X-ray diffraction.
University of Jyvaskyla, Department of Chemistry, P. O. Box 35, 40014 University of Jyvaskyla, Jyvaskyla, Finland. ngong.k.beyeh@jyu.fi.
Ngong Kodiah
NK
Beyeh
Rakesh
R
Puttreddy
D047250:Calixarenes / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011725:Pyridines / Q000737:chemistry*; D014961:X-Ray Diffraction
D056831:Coordination Complexes; D011725:Pyridines; D047250:Calixarenes; D003300:Copper; C013229:pyridine N-oxide