Metal‐Dependent Formation of Mononuclear Complexes and M<sub>2</sub>L<sub>2</sub> Mesocates with Schiff‐Base Ligands

Fielden, John; Long, De‐Liang; Evans, Cameron; Cronin, Leroy

doi:10.1002/ejic.200600367

Cited by 18 publications

(8 citation statements)

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“…The two hydroxy groups in each phendiol ligand form intermolecular O-HÁ Á ÁCl hydrogen bonds with a single Cl atom of an adjacent molecule that is related by a centre of inversion ( Table 2). The O-HÁ Á ÁCl hydrogen-bond data found here are comparable with those found in the literature (Fielden et al, 2006;George et al, 2006;Venegas-Yazigi et al, 2006;Wong et al, 2006). The four O-HÁ Á ÁCl hydrogen bonds about each inversion centre form a ring containing two Mn II atoms, two Cl atoms and two phendiol ligands (Fig.…”

Section: Commentsupporting

confidence: 88%

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ²N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking

Guan

et al. 2008

Acta Crystallogr C

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The title compound, [MnCl(2)(C(12)H(8)N(2)O(2))(2)], displays a novel supramolecular chain formed by intermolecular O-H...Cl hydrogen bonds and aromatic stacking. The molecule has crystallographically imposed twofold symmetry with the Mn(II) atom on the twofold axis. In the 1,10-phenanthroline-5,6-diol ligand, each H atom of the two hydroxy groups is oriented towards the other hydroxy O atom. Both hydroxy groups form intermolecular O-H...Cl hydrogen bonds with a single Cl atom of an adjacent molecule. These hydrogen bonds connect the molecules via operation of the molecular twofold axis and the centre of inversion of the crystal lattice, forming a doubly-bridged one-dimensional structure with Mn atoms as the nodes. Strong aromatic pi-stacking between two antiparallel neighbouring 1,10-phenanthroline-5,6-diol ligands also helps to stabilize the chain.

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Section: Commentsupporting

confidence: 88%

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ²N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking

Guan

et al. 2008

Acta Crystallogr C

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“…Other reports involve Schiff pyridylimine ligands in supramolecular chemistry to promote the formation of helicates [15] and mesocates [16].…”

Section: Introductionmentioning

confidence: 98%

Synthesis, characterization and molecular structures of Ni(II) complexes derived from Schiff base pyridylimine ligands

Pioquinto‐Mendoza

Rosas-Ortiz

Reyes-Martínez

et al. 2015

Inorganica Chimica Acta

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“…The degree of interpenetration mainly depends on the dihedral angle between the two carboxylic groups of the ligand. On the other hand, pyridine ligands with flexible spacers such as aliphatic (−(CH 2 ) n –), thio (−S–(CH 2 ) n –S−), Schiff base type (−CHN–(CH 2 ) n –NCH−), amide (−CONH–(CH 2 ) n –CONH−), and ether (−C–O–(CH 2 ) n –O–C−), etc. have been widely explored as secondary ligands.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structural Characterization, and Magnetic Properties of a New Series of Coordination Polymers: Importance of Steric Hindrance at the Coordination Sphere

Manna

Tripuramallu

Das

2012

Crystal Growth & Design

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Six cobalt(II) containing coordination polymers {Co(hfipbb)(L1)0.5} n (1), {Co(hfipbb)(L2)0.5} n (2), {Co(oba)(L1)0.5} n (3), {Co(oba)(L2)} n ·nH2O (4), {Co(1,2-pda)(L1)0.5} n (5), and [Co(1,2-pda)(L2)(H2O)] n ·nH2O (6), that are formed from two positional isomeric bis(pyridyl) ligands with a long flexible spacer 1,4-bis(2-pyridylaminomethyl)benzene (L1) and 1,4-bis(3-pyridylaminomethyl)benzene (L2) and three different bent carboxylic acids 4,4′-(hexa-fluoroisopropylidene)bis-(benzoicacid) (H2hfipbb), 4,4′-oxybenzoic acid (H2oba), and 1,2-phenylenediaceticacid (1,2-H2pda), have been synthesized under hydrothermal conditions. Compounds 1–6 are characterized by single crystal X-ray diffraction analysis, IR spectroscopy, and thermogravimetric (TG) and elemental analysis. In the crystal structures of compounds 1, 3, and 5, two-dimensional (2D) metal-carboxylic acid layers, composed of dicobalt tetracarboxylate paddle-wheel clusters, are formed whereby these layers are pillared by the secondary ligand L1 in a typical trans–trans–trans conformation to result in a three-dimensional (3D) layered-pillared structure. However, in the crystals of compounds 2, 4, and 6 with secondary ligand L2, it does not favor the formation of paddle-wheels resulting in three completely different coordination polymers. The geometry of the carboxylic acid influences the formation of 2D metal acid layers in the compounds 1, 3, and 5 to form interpenetrated helical double layers to single layers. In compound 2, the secondary ligand L2 diagonally connects the 3D metal acid framework in a regular trans–trans–trans conformation. In compound 4, the ligand L2 exists in cis–cis–trans conformation to form [Co2L22] loops (metallo-macrocycles) which are connected by the oba2– ligand to form polyrotaxane-like 2D polymers. In compound 6, ligand L2 exists in an unusual cis–trans–cis conformation to allow the pda2– in a rare cis conformation to form one-dimensional (1D) ladders. The conformations of the pyridyl ligands L1 and L2 have been explained based on the torsion angle measurement. The steric hindrance created by the isomeric flexible pyridyl ligands at the metal coordination sphere plays an important role in the modulation of the conformation of the secondary ligand that drives the self-assembly of the coordination polymers. Finally, temperature-dependent magnetic susceptibility studies for the compounds 1–5 have been described.

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Metal‐Dependent Formation of Mononuclear Complexes and M₂L₂ Mesocates with Schiff‐Base Ligands

Abstract: The coordination chemistry of the tetradentate pyridyl N-donor ligands r- 1-hydroxy-t-3,t-5-bis{[(2-pyridinyl)

Cited by 18 publications

References 25 publications

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ²N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ²N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking

Synthesis, characterization and molecular structures of Ni(II) complexes derived from Schiff base pyridylimine ligands

Synthesis, Structural Characterization, and Magnetic Properties of a New Series of Coordination Polymers: Importance of Steric Hindrance at the Coordination Sphere

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Metal‐Dependent Formation of Mononuclear Complexes and M2L2 Mesocates with Schiff‐Base Ligands

Abstract: The coordination chemistry of the tetradentate pyridyl N-donor ligands r- 1-hydroxy-t-3,t-5-bis{[(2-pyridinyl)

Cited by 18 publications

References 25 publications

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ2N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ2N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking

Synthesis, characterization and molecular structures of Ni(II) complexes derived from Schiff base pyridylimine ligands

Synthesis, Structural Characterization, and Magnetic Properties of a New Series of Coordination Polymers: Importance of Steric Hindrance at the Coordination Sphere

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Metal‐Dependent Formation of Mononuclear Complexes and M₂L₂ Mesocates with Schiff‐Base Ligands

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ²N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking

cis-Dichloridobis(1,10-phenanthroline-5,6-diol-κ²N,N′)manganese(II): a supramolecular chain formedviaO—H...Cl bonds and aromatic stacking