88769-67-9Relevant academic research and scientific papers
Coordination behavior of 4-toluenesulfonamide 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)
Antolini,Menabue
, p. 1418 - 1422 (2008/10/08)
The compounds of formula [Cu(Tsgly)(bpy)L] and anhydrous [Cu(Tsgly)(bpy)] (Tsgly = N-tosylglycinate dianion; bpy = 2,2′-bipyridine; L = EtOH, H2O) were 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 compound crystallizes in the monoclinic space group P21/n with 4 formula units in a cell of dimensions a = 9.677 (1) ?, b = 10.460 (1) ?, c = 21.488 (2) ?, and β = 98.27 (1)°. The structure was solved by the heavy-atom method and refined by least-squares calculations to R = 0.039 for 1705 observed reflections. The structure consists of discrete molecular units of [Cu(Tsgly)(bpy)(EtOH)]. The Cu atom shows tetrahedrally distorted square-pyramidal N3O2 coordination. The Tsgly dianion and the bpy molecule act as bidentate ligands in the equatorial plane, and the ethanol is bonded to the metal atom in the apical position. The thermogravimetric, EPR, and electronic results for the aquo and ethanol derivatives suggest that the stability of the in-plane ligands permits successive substitution reactions at the apical position. The infrared spectra for the aquo and ethanol adducts are consistent with the presence of a coordinated water or ethanol molecule.
