Complexes derived from the copper(II) perchlorate/maleamic acid/2,2′-bipyridine and copper(II) perchlorate/maleic acid/2,2′-bipyridine reaction systems: Synthetic, reactivity, structural and spectroscopic studies

Crystal Structures and Thermal Properties of Two Binuclear Cd(II) Supramolecular Complexes Based on Quinolinecarboxylate Ligand

“…And the metal ions are separated by a Cd···Cd distance of 3.835 Å, which is markedly longer than those observed complexes with this mode (3.4-3.7 Å). [29][30][31][32] The bridging carboxylate group adopts the rather rare μ 2 -η 2 :η 0 coordination mode, which is uncommon in metal carboxylate chemistry, leading to a significant difference in the C-O bond lengths (1.282 Å and 1.228 Å) within the carboxylate group. 32 The second carboxylate group of each L ligand is monodentately coordinated to Cd(II) giving rise to a seven-membered chelating ring.…”

Mononuclear vs. binuclear carboxylates of copper(II) with 2,2′‐bipyridine: Synthesis, characterization, structural description, and properties

“…Mononuclear carboxylates contain one or two 2,2′‐bipyridine ligands with carboxylates of varying structure and ligature atoms. The geometry around copper in the former category is octahedral or square pyramidal depending on the attached ligands other than the N‐donor. The binuclear copper(II) carboxylates containing 2,2′‐bipyridine present more structural diversity.…”

“…Carboxylate moiety exhibits diverse coordination and bridging modes in copper carboxylate complexes. It can be 1,2‐bidentate symmetric bridging or 1,1‐bidentate asymmetric bridging or even other types of bridging modes . The other category is polymeric copper(II) carboxylates with 2,2′‐bipyridine.…”

Synthesis, Crystal Structures and Magnetic Properties of a Linear Trinuclear Cu(II) Complex [Cu3(ClCH2COO)6(bpy)2] and a Dinuclear Complex [Cu2(bpy)2(μ‐OH)(μ‐OH2) (μ‐ClCH2COO)](ClO4)2

“…The role of carboxylate ions as providers of super exchange pathway between paramagnetic metal ions is now well known . Carboxylate groups can adopt various bridging modes, the most important being triatomic syn–syn , syn–anti and anti–anti , and the chelating monoatomic mode as shown in Scheme . In the classical dinuclear complex, Cu 2 (CH 3 COO) 4 ⋅2H 2 O, the four acetate ions are involved in forming syn‐syn bridges ,.…”