By controlling the metal–ligand ratio, we obtained two 2D sliver complexes from a symmetric to noncentrosymmetric architecture based on 2,2′-phosphinico-dibenzoic acid (H3L). The four groups around the phosphorus atom of the L3− ligand connect the Ag(i) ions through different coordination modes to form a noncentrosymmetric complex 2.

The copper complexes [Cu4(μ‐L1)2(μ1, 1‐N3)2·(CH3O)2] (1) and [Cu4(μ‐L2)2(μ1, 1‐N3)2(N3)2]·(H2O)2 (2) [H2L1 = (1R,3S)‐N′,N′′‐bis[salicylidene]‐1, 3‐diamino‐1, 2, 2‐trimethylcyclopentane and H2L2 = (1R,3S)‐N′,N′′‐bis[5‐methylsalicylidene]‐1, 3‐diamino‐1, 2, 2‐trimethylcyclopentane] were synthesized and structurally characterized by elemental analyses, IR spectroscopy, and single crystal X‐ray diffraction. Both are tetranuclear complexes consisting of dinuclear copper moieties [Cu2L1]2+ or [Cu2L2]2+ connected by two end‐on azido bridges. Low temperature magnetic studies indicate that weak antiferromagnetic couple dominates in 1 and 2.

Six novel Co(ii) coordination polymers, namely, [CoL(OH)(HO)]·10.5HO (1), [CoL(3-abpt)]·4HO (2), [CoL(4-azpy)(HO)(EtOH)] (3), [CoL(4,4'-bipy)(HO)(MeCN)] (4), [CoL(4,4'-bipy)] (5), and [CoL(OH)(ina)(HO)] (6) (HL = 2,2'-phosphinico-dibenzoic acid, 3-abpt = 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole, 4-azpy = 4,4'-azobispyridine, 4,4'-bipy = 4,4'-bipyridine, Hina = isonicotinic acid), have been hydrothermally synthesized and their magnetic properties have been characterized. The L anion displays six types of coordination modes in the compounds. Compound 1 exhibits a novel 1D ladder-like structure, which consists of non-centrosymmetric Co units. Compounds 2-4 comprise 2D networks assembled from CoL chains and N-heterocyclic linkers. Compound 5 comprises a 3D framework built from six neighboring parallel CoL ladders bridged by 4,4'-bipy linkers. Compound 6 features a 3D framework that exhibits pcu topology with the Schläfli symbol of (4·6) using a pentanuclear [Co(OH)] cluster as the node. Variable-temperature magnetic susceptibility studies indicate that the six coordination polymers exhibit remarkable magnetic behavior such as spin-canted antiferromagnetism and spin glass, which were found to coexist in compound 6.

Abstract. Reaction of CuCl 2 ·2H 2 O with chiral Schiff bases and sodium dicyanamide led to the formation of two chiral copper(II) coordination polymers, namely [Cu 4 Both complexes were structurally characterized by elemental analyses, IR spectroscopy and single-crystal X-ray diffraction.