Coordination behavior of 4-toluenesuphonamide derivatives: thermal, and spectroscopic properties of (N-tosylglycinato)(2,2'-bipyridine)copper(II) complexes. Crystal and molecular structure of (ethanol) (N-tosylglycinato)(2,2'-bipyridine)copper(II).

The compounds of formula [Cu(Tsgly)(bpy)L] and anhydrous [Cu(Tsgly)(bpy)] (Tsgly = N-tosylglycinate dianion; bpy= 2,2’-bipyridine;L = EtOH, H20)w ere synthesized and characterized by means of thermogravimetric, electronic, infrared,and EPR spectra. For one of them, the [Cu(Tsgly)(bpy)(EtOH)] complex, the crystal structure was also determined. The structure consists of discrete molecular unitsof [Cu(Tsgly)(bpy)(EtOH)]. The Cu atom shows tetrahedrally distorted square-pyramidal N3O2 coordination. The Tsglydianion and the bpy molecule act as bidentate ligands in the equatorial plane, and the ethanol is bonded to the metal atomin the apical position. The thermogravimetric, EPR, and electronic results for the aquo and ethanol derivatives suggestthat the stability of the in-plane ligands permits successive substitution reactions at the apical position. The infrared spectrafor the aquo and ethanol adducts are consistent with the presence of a coordinated water or ethanol molecule.