Synthesis, Crystal Structures and Magnetic Properties of a Phenoxo‐Bridged Dinuclear Cu^II Complex and a Dicyanamide Bridged Novel Molecular Rectangle Based on It

Abstract

2) were synthesized using the tridentate reduced Schiff-base ligand HL {2-[(2-dimethylamino-ethylamino)methyl]phenol}. The complexes were characterized by X-ray structural analyses and variable-temperature magnetic susceptibility measurements. Complex 2 was formed through the joining of the phenoxobridged dinuclear Cu 2 O 2 cores of 1 via the μ 1,5 -bridging [a] Figure 2. Hydrogen bonding polymeric structure of compound 1; hydrogen atoms except H19 have been excluded for clarity.

Assembly of dinuclear copper(ii) secondary building units into polymeric complexes: crystal structures and magnetic properties

“…It should be mentioned that the weak magnetic couplings via μ 1,5 or μ 1,3 -dca can be ignored for complexes 2 and 4. 1,[4][5][6]54 Indeed, at low temperature, the values of χ m T for complexes 2-4 are all nearly zero, in other words, nearly diamagnetic. Therefore, the best fit parameters are J = −117(1) cm −1 and g = 2.17(1) for complex 2, J = −587(5) cm −1 and g = 2.16(9) for complex 3, and J = −401(5) cm −1 and g = 2.15(6) for complex 4.…”

Assemblies of 1D and 2D Copper(II) Chiral Coordination Polymers by Salicylaldehyde Schiff Bases: Synthesis, Crystal Structures, and Magnetic Properties

“…Both Cu 2 dimers are linked through double μ 1,5 -dca anions, leading to the formation of the asymmetric tetranuclear copper unit (Cu 4 ), which is similar to other tetranuclear complexes bridged by dca anions. [14] The neighboring Cu 4 units are bridged by single μ 1,5 -dca anion, generating a zigzag chain as shown in Figure 2a which is different from the reported in the literature. [15] These zigzag chains are arranged parallel to each other, and further connected via μ 1,5 -dca bridges to form a 2D polymeric network (Figure 2b), in which chiral ligands are interdigitated ( Figure S1, Supporting Information).…”

Modulatingp-hydroxycinnamate behavior as a ditopic linker or photoacid in copper(ii) complexes with an auxiliary pyridine ligand

“…52,53 This is also applied in Cu(II) dimers bridged by phenoxy groups. [54][55][56] Most of the Cu 2 O 2 core magnetic pathways including phenolic oxygen atoms are antiferromagnetic, 53,[55][56][57][58] but a few of them are ferromagnetic. 59 Taking this into account, the J 1 value could be assigned to the 5-cis subunit, as its value is in the range of other phenoxy-bridged Cu(II) dimers.…”