Bis[4-nitro-N-(quinolin-8-yl)benzenesulfonamidato-κ²N,N′]copper(II)

Abstract

The asymmetric unit of the title compound, [Cu(C15H10N3O4S)2], contains one half‐mol­ecule. The other half of the complex mol­ecule is related by a C2 axis running through the Cu atom. The Cu atom is four‐coordinated by two quinoline N and two sulfonamide N atoms. In the crystal structure, the mol­ecules are linked through inter­molecular C—H⋯O hydrogen bonds.

Illuminating Metal-Ion Sensors: Benzimidazolesulfonamide Metal Complexes

“…The Zn 2+ complexes do not differ significantly from the TPBI complex reported here, aside from those differences described above 3, 8, 11, 12, 14, 15, 23. In the case of Cu 2+ , the ability of the TPBI ligand to supply a third donor deters the formation of a homoleptic complex as found in previously reported structures with 8-sulfonamidoquinoline ligands 9, 10, 13, 16–20. The metal adopts the favored square planar geometry and avoids steric clashes between ligands by retaining a chloride ligand as its fourth donor.…”

“…Angling of the sulfonamide group toward the metal allows one of the O atoms to act as a weak donor, which is a feature not found in the structures of analogous quinoline-based complexes. 3,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Many homoleptic complexes of quinolinesulfonamide ligands with Zn 2þ and Cu 2þ have been previously reported. The Zn 2þ complexes do not differ significantly from the TPBI complex reported here, aside from those differences described above.…”

“…3,8,11,12,14,15,23 In the case of Cu 2þ , the ability of the TPBI ligand to supply a third donor deters the formation of a homoleptic complex, as found in previously reported structures with 8-sulfonamidoquinoline ligands. 9,10,13,[16][17][18][19][20] The metal adopts the favored square-planar geometry and avoids steric clashes between ligands by retaining a chloride ligand as its fourth donor. The more electron-deficient Co 2þ and Ni 2þ have complexes reported with two quinolinesulfonamide ligands, but the metals also ligate two solvent molecules (water or methanol) in order to adopt an octahedral geometry.…”

“…The other consequence of the six-membered chelate is the closer positioning of the sulfonamide functionality to the metal, as observed by the N benz/quin −N amide −S angle (∼170° for quinoline-based complexes compared to 150° for TPBI). Angling of the sulfonamide group toward the metal allows one of the O atoms to act as a weak donor, which is a feature not found in the structures of analogous quinoline-based complexes. ,− …”

Synthesis, structure and physicochemical properties of zinc and copper complexes based on sulfonamides containing 8-aminoquinoline ligands

“…The X-ray crystal structures of the complexes have been already reported in the literature. [16][17][18][19] …”