Synthesis and characterization of copper(I) coordination compounds with (1-(2-pyridylazo)-2-naphthol) and (4-(2-pyridylazo)resorcinol)

Add time:07/19/2019    Source:sciencedirect.com

Two cuprous complexes with 1-(2-pyridylazo)-2-naphthol (PAN) or 4-(2-pyridylazo)resorcinol (PAR) and triphenylphosphines, [Cu(PAN)(PPh3)2]BF4 (1) and [Cu(PAR)(PPh3)2]BF4 (2), are described in this work. The structures of both compounds were characterized by NMR and UV–Vis spectroscopies, mass spectrometry, IR-ATR measurements and DFT calculations. The single crystal diffraction of both complexes confirmed that the coordination polyhedrons around the copper centres are distorted tetrahedrons. Interestingly, the PAR and the PAN ligands are not planar in the synthesized complexes. The ligands coordinate to the central copper(I) ions by only two nitrogen atoms: one from pyridine and one from an azo group. The oxygen atoms from the hydroxyl groups do not form bonds with copper, but take part in strong intramolecular hydrogen bonds, which stabilize the conformations of the ligands. It is noteworthy that these bonds have different characters. In complex 2 we observed a typical O–H⋯N hydrogen bond, whereas in complex 1 proton transfer takes place, resulting in O⋯H–N bond formation. DFT data confirm the different characters of the H-bonds observed in the X-ray structures.

We also recommend Trading Suppliers and Manufacturers of 4-(2-PYRIDYLAZO)RESORCINOL (cas 13311-52-9). Pls Click Website Link as below: cas 13311-52-9 suppliers

Prev:Optical and structural characterization of immobilized 4-(2-pyridylazo)resorcinol in chitosan-graphene oxide composite thin film and its potential for Co2+ sensing using surface plasmon resonance technique
Next:Charge-transfer interaction of 4-(2-pyridylazo)resorcinol with nitroaromatics: Insights from experimental and theoretical results)