Interaction of the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ with 4,4′-Bipyridine. Structural Characterizations of New Coordination Polymers and Hexanuclear Cu^II Clusters. 2°

By reacting 4,4′-bipyridine (bpy) with selected trinuclear triangular Cu^II complexes, [Cu₃(μ₃-OH)­(μ-pz)₃­(RCOO)₂­(LL′)] [pz = pyrazolate anion; R = CH₃, CH₃CH₂, CH₂CH, CH₂C­(CH₃); L, L′ = Hpz, H₂O, MeOH] in MeOH, the substitution of monotopic ligands by ditopic bpy was observed. Depending on the stoichiometric reaction ratios, different compounds were isolated and structurally characterized. One- and two-dimensional coordination polymers (CPs), as well as two hexanuclear Cu^II clusters were identified. One of the hexanuclear clusters self-assembles into a supramolecular three-dimensional structure, and its crystal packing shows the presence of two intersecting channels, one of which is almost completely occupied by guest bpy, while in the second one guest water molecules are present. This compound also shows a reversible, thermally induced, single-crystal-to-single-crystal transition

Coordination Polymers Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ (pz = pyrazolate) and Succinate Anion

Reaction conditions (solvent, temperature, pressure) and reagents ratios control the formation of different products from the reactions involving Cu^II, pyrazole (Hpz), and succinate ion (Suc). Three different coordination polymers (CPs) (one of which porous) based on the trinuclear triangular Cu₃(μ₃-OH)­(μ-pz)₃ secondary building unit (SBU), as well as a 1D CP based on the Cu­(Hpz)₂ SBU were obtained. Moreover, a 3D supramolecular network, formed through quite strong H-bonding interactions involving the mononuclear Cu­(HSuc)₂(Hpz)₄ complex, was also synthesized when an excess of H₂Suc was added

Coordination Polymers Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ (pz = pyrazolate) and Succinate Anion

Reaction conditions (solvent, temperature, pressure) and reagents ratios control the formation of different products from the reactions involving Cu^II, pyrazole (Hpz), and succinate ion (Suc). Three different coordination polymers (CPs) (one of which porous) based on the trinuclear triangular Cu₃(μ₃-OH)­(μ-pz)₃ secondary building unit (SBU), as well as a 1D CP based on the Cu­(Hpz)₂ SBU were obtained. Moreover, a 3D supramolecular network, formed through quite strong H-bonding interactions involving the mononuclear Cu­(HSuc)₂(Hpz)₄ complex, was also synthesized when an excess of H₂Suc was added

Coordination Polymers Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ (pz = pyrazolate) and Succinate Anion

Reaction conditions (solvent, temperature, pressure) and reagents ratios control the formation of different products from the reactions involving Cu^II, pyrazole (Hpz), and succinate ion (Suc). Three different coordination polymers (CPs) (one of which porous) based on the trinuclear triangular Cu₃(μ₃-OH)­(μ-pz)₃ secondary building unit (SBU), as well as a 1D CP based on the Cu­(Hpz)₂ SBU were obtained. Moreover, a 3D supramolecular network, formed through quite strong H-bonding interactions involving the mononuclear Cu­(HSuc)₂(Hpz)₄ complex, was also synthesized when an excess of H₂Suc was added

Coordination Polymers Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ (pz = pyrazolate) and Succinate Anion

Reaction conditions (solvent, temperature, pressure) and reagents ratios control the formation of different products from the reactions involving Cu^II, pyrazole (Hpz), and succinate ion (Suc). Three different coordination polymers (CPs) (one of which porous) based on the trinuclear triangular Cu₃(μ₃-OH)­(μ-pz)₃ secondary building unit (SBU), as well as a 1D CP based on the Cu­(Hpz)₂ SBU were obtained. Moreover, a 3D supramolecular network, formed through quite strong H-bonding interactions involving the mononuclear Cu­(HSuc)₂(Hpz)₄ complex, was also synthesized when an excess of H₂Suc was added

Coordination Polymers Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ (pz = pyrazolate) and Succinate Anion

Reaction conditions (solvent, temperature, pressure) and reagents ratios control the formation of different products from the reactions involving Cu^II, pyrazole (Hpz), and succinate ion (Suc). Three different coordination polymers (CPs) (one of which porous) based on the trinuclear triangular Cu₃(μ₃-OH)­(μ-pz)₃ secondary building unit (SBU), as well as a 1D CP based on the Cu­(Hpz)₂ SBU were obtained. Moreover, a 3D supramolecular network, formed through quite strong H-bonding interactions involving the mononuclear Cu­(HSuc)₂(Hpz)₄ complex, was also synthesized when an excess of H₂Suc was added

New Coordination Polymers and Porous Supramolecular Metal Organic Network Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ and 4,4′-Bypiridine. 1°

The trinuclear triangular Cu^II complex [Cu₃(μ₃-OH)­(μ-pz)₃(HCOO)₂(Hpz)₂] (Hpz = pyrazole) reacts with 4,4′-bipyridine (bpy) yielding a two-dimensional (2D) waved sheets, two three-dimensional (3D) coordination polymers (CPs), as well as a hexanuclear Cu^II cluster, depending on the reagent ratios and reaction conditions. Single crystal X-ray diffraction (XRD) determinations point out that, while CPs crystal structures are not porous, the hexanuclear Cu^II clusters are packed in the solid state generating a stable porous 3D supramolecular network, where two kinds of perpendicular, hydrophobic channels (ca. 4.83 × 5.86 Ų and 4.99 × 4.79 Ų, corresponding to the 24.7% of the total crystal volume) are present. In the “as-synthesized” compound, channels of one kind are empty, while the other ones are occupied by guest bpy molecules which can be removed by soaking the crystals in suitable solvents (benzene, toluene, <i>c</i>-hexane) maintaining intact the crystal skeleton. Moreover, two of the above complexes act as catalysts (or catalyst precursors) in the peroxidative oxidation of cyclohexane

New Coordination Polymers and Porous Supramolecular Metal Organic Network Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ and 4,4′-Bypiridine. 1°

The trinuclear triangular Cu^II complex [Cu₃(μ₃-OH)­(μ-pz)₃(HCOO)₂(Hpz)₂] (Hpz = pyrazole) reacts with 4,4′-bipyridine (bpy) yielding a two-dimensional (2D) waved sheets, two three-dimensional (3D) coordination polymers (CPs), as well as a hexanuclear Cu^II cluster, depending on the reagent ratios and reaction conditions. Single crystal X-ray diffraction (XRD) determinations point out that, while CPs crystal structures are not porous, the hexanuclear Cu^II clusters are packed in the solid state generating a stable porous 3D supramolecular network, where two kinds of perpendicular, hydrophobic channels (ca. 4.83 × 5.86 Ų and 4.99 × 4.79 Ų, corresponding to the 24.7% of the total crystal volume) are present. In the “as-synthesized” compound, channels of one kind are empty, while the other ones are occupied by guest bpy molecules which can be removed by soaking the crystals in suitable solvents (benzene, toluene, <i>c</i>-hexane) maintaining intact the crystal skeleton. Moreover, two of the above complexes act as catalysts (or catalyst precursors) in the peroxidative oxidation of cyclohexane

New Coordination Polymers and Porous Supramolecular Metal Organic Network Based on the Trinuclear Triangular Secondary Building Unit [Cu₃(μ₃‑OH)(μ-pz)₃]²⁺ and 4,4′-Bypiridine. 1°

The trinuclear triangular Cu^II complex [Cu₃(μ₃-OH)­(μ-pz)₃(HCOO)₂(Hpz)₂] (Hpz = pyrazole) reacts with 4,4′-bipyridine (bpy) yielding a two-dimensional (2D) waved sheets, two three-dimensional (3D) coordination polymers (CPs), as well as a hexanuclear Cu^II cluster, depending on the reagent ratios and reaction conditions. Single crystal X-ray diffraction (XRD) determinations point out that, while CPs crystal structures are not porous, the hexanuclear Cu^II clusters are packed in the solid state generating a stable porous 3D supramolecular network, where two kinds of perpendicular, hydrophobic channels (ca. 4.83 × 5.86 Ų and 4.99 × 4.79 Ų, corresponding to the 24.7% of the total crystal volume) are present. In the “as-synthesized” compound, channels of one kind are empty, while the other ones are occupied by guest bpy molecules which can be removed by soaking the crystals in suitable solvents (benzene, toluene, <i>c</i>-hexane) maintaining intact the crystal skeleton. Moreover, two of the above complexes act as catalysts (or catalyst precursors) in the peroxidative oxidation of cyclohexane