Cobalt complexes of the chelating dicarboxylate ligand "esp": a paddlewheel-type dimer and a heptanuclear coordination cluster

The coordination chemistry of Co(ii) with the chelating dicarboxylate ligand esp (esp = α,α,α',α'-tetramethyl-1,3-benzenedipropionate) is explored. We report here the bimetallic paddlewheel-type dimer, Co2(esp)2(EtOH)2 (1), and a bowl-shaped, heptanuclear coordination cluster, Co7(OH)4(Hesp)2(esp)4(MeCN)2·4MeCN (2). Crystal structures of both complexes are reported as well as their magnetic properties, which indicate antiferromagnetic interactions among the Co(ii) ions.

Tuning different kinds of entangled metal–organic frameworks by modifying the spacer group of aliphatic dicarboxylate ligands and the reactant ratio

Presented here are a series of coordination polymers with different entangled motifs which were synthesized using different dicarboxylic acid ligands and reactant ratios.

Tuning of net architectures of Ni(ii) and Zn(ii) coordination polymers using isomeric organic linkers

Ni(ii) and Zn(ii) coordination polymers with diverse net topologies were synthesized using isomeric organic linkers.

Self-assembly and magnetic properties of Ni(ii)/Co(ii) coordination polymers based on 1,4-bis(imidazol-1-yl)benzene and varying biphenyltetracarboxylates

Five complexes of 1,4-bis(imidazol-1-yl)benzene, H₄bptas and cobalt/nickel are synthesized via solvothermal reaction; both of them have intriguing interpenetrated architectures.

Syntheses, crystal structures, photoluminescent/magnetic properties of four new coordination polymers based on 2,3′,4,5′-biphenyltetracarboxylic acid

Complex 1 is a (4,10)-connected deh1 net. Both complexes 2 and 4 exhibit (4,4)-connected mog moganite nets and novel (3,4,4)-connected networks respectively. Complex 3 is a 3D supermolecular net assembled by 1D anionic chains and cationic chains.

Bis(2,2'-bipyridine-κ(2)N,N')(3-methyl-benzoato-κ(2)O,O')zinc 3-methyl-benzo-ate-3-methyl-benzoic acid-water (1/1/2)

The title compound, [Zn(C(8)H(7)O(2))(C(10)H(8)N(2))(2)](C(8)H(7)O(2))·C(8)H(8)O(2)·2H(2)O, is comprised of a Zn(2+) cation, two 2,2'-bipydine (bipy) ligands and one 3-methyl-benzoate anion (L(-)) together with one uncoordinating L(-) anion, one uncoordinating HL mol-ecule and two lattice water mol-ecules. The Zn(II) atom is coordinated by four N atoms of two bipy ligands and two O atoms from one L(-) ligand in a distorted octa-hedral geometry. Pairs of centrosymmetrically related complex mol-ecules form dimers via slipped π-stacking inter-actions between bipy ligands with an inter-planar distance of 3.470 (4) Å. The dimers are linked into supra-molecular chains along [111], via C-H⋯O hydrogen bonds. The uncoordinated L(-) anions, HL mol-ecules and water mol-ecules are connected with each other via O-H⋯O hydrogen bonds, forming chains between the metal complex chains and binding them together via C-H⋯O contacts. The resulting layers parallel to (010) are further assembled into a three-dimensional supra-molecular architecture through additional C-H⋯O inter-actions.