Chiral and achiral copper(ii) complexes: structure, bonding and biological activities

Abstract

A route to noncentrosymmetric hybrid materials is discussed through three noncentrosymmetric materials. These compounds crystallize in either a chiral polar or achiral polar space group, and exhibit high antioxidant and anti-hypertensive activities.

Crystal structure, spectroscopic measurement, optical properties, thermal studies and biological activities of a new hybrid material containing iodide anions of bismuth(iii)

“…These results were in agreement with previous metallic complexes studies, where the ligand has an antioxidant potential and it is expected that the metal moiety will increase its activity. 84 The reducing power assay is based on the reduction of Fe 3+ / ferricyanide complex to the ferrous form, which serves as a signicant indicator of a potent antioxidant activity. As shown in (Fig.…”

Catalytic and biological valorization of a supramolecular mononuclear copper complex based 4‐aminopyridine

“…In this complex, the copper atom is located in a special position and coordinated by four nitrogen atoms of the pyridine ligand with Cu-N bonds distance ranging from 2.003 (5) to 2.035 (8) Å and N-Cu-N angles varying from 88.47 (15) to 180.000 (3)°( Table 2). These values fall in the range reported previously for compounds containing Cu-N bonds.…”

“…The TG curve illustrates that the compound is thermally stable up to 80°C and the first mass loss starts above 80°C due to the decomposition of two DMF molecules (observed weight loss, 18.8%; calculated weight loss, 19.58%). This N3-Cu-N5 180.000 (3) N2-C3-C2 121.2 (7) C10 i -N5-C10 116.9 (9) C4-C3-C2 116.0 (7) C10 i -N5-Cu 121.6 (4) C5-C4-C3 120.7 (7) C10-N5-Cu 121.6 (4) C1-C2-C3 119.2 (7) C7-N3-C7 i 116.1 (9) O1-C13-N7 123.9 (9) C7-N3-Cu 121.9 (4) C13-N7-C15 121.3 (7) C7 i -N3-Cu 121.9 (4) C13-N7-C14 121.9 (8) C5-N1-C1 115.3 (6) C15-N7-C14 116.7 (7) C5-N1-Cu 122.4 (5) N1-C5-C4 123.8 (7) C1-N1-Cu 122.3 (5) N5-C10-C11 122.9 (8) C10-C11-C12 120.7 (7) C7-C8-C9 119.6 (7)…”

“…and the structure of the organic molecule (shape, number and type of reactive functional groups). The development of new solid‐state structures, which involve the self‐assembly of molecules into well‐defined supramolecular via noncovalent, multiple intermolecular interactions, showed the diversity of such materials in terms of structure, topology and composition . The bonding in these materials is just as diverse as their structures, with covalent, ionic, and coordination bonds, hydrogen bonding, van‐der Waals (vdW) forces, and π···π stacking, being observed in a single compound.…”

“…The development of new solid-state structures, which involve the selfassembly of molecules into well-defined supramolecular via noncovalent, multiple intermolecular interactions, showed the diversity of such materials in terms of structure, topology and composition. [6][7][8][9][10] The bonding in these materials is just as diverse as their structures, with covalent, ionic, and coordination bonds, hydrogen bonding, van-der Waals (vdW) forces, and π···π stacking, being observed in a single compound. On the other hand, copper (II) is a typical transition metal ion characterized by its ability to form a wide range of coordination complexes, incorporating octahedral, tetrahedral and square-coplanar along with many kinds of irregular coordination geometries and, thus offering a good structure diversity.…”