(<i>OC</i>-6-32)-Diaquabis(glycolato)cobalt(II)

Carballo, Rosa; Castiñeiras, Alfonso; Covelo, Berta; Garcı́a-Martı́nez, Emilia; Vázquez‐López, Ezequiel M.

doi:10.1107/s1600536803015083

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…The main deviation from an ideal octahedral coordination is caused by the bipyridine N–M–N bite angle, which ranges from 79.4 to 81.8° (for Zn and Ni, respectively). This is slightly less acute than the typical values in related 2,2′‐bipyridine (bipy) complexes such as [Co(bipy)(OAc) 2 (H 2 O) 2 ] (76.6°),25 [Ni(bipy)(H 2 O) 4 ](SO 4 ) (79.4)26 and [Zn(bipy)(H 2 O) 4 ](C 6 H 4 ‐1,4‐CO 2 ) (76.1°) 27. The M–N bond lengths fall in the expected ranges.…”

Section: Resultsmentioning

confidence: 71%

Na₂(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes

Oelkers

2014

Eur J Inorg Chem

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The sulfonated bipyridine derivative disodium 6,6Ј-bis-(sulfonatomethyl)-2,2Ј-bipyridine [Na 2 (smbipy)] was synthesized, and its complexation behaviour towards divalent 3d metals in aqueous solution was explored. The complexes of late 3d metals [M(smbipy)(H 2 O) 2 ]·H 2 O (M = Co, Ni, Zn) and [Cu(smbipy)(H 2 O)] are sparingly soluble in water, and their crystal structures show fourfold equatorial coordination (κ 4 N,NЈ,O,OЈ) of the smbipy ligand. Ammonia-rich solutions of the Ni II and Cu II aqua complexes yield the decomplexation [a] 5838 products [Ni(NH 3 ) 6 ](smbipy), [Ni(NH 3 ) 5 (H 2 O)](smbipy) and [Cu(NH 3 ) 4 ](smbipy)·2H 2 O. Buffered solutions with a reduced ammonia content lead to [Ni(smbipy)(NH 3 ) 2 ] and [Cu(smbipy)(NH 3 ) 3 ]·2H 2 O, and the latter shows twofold coordination of the smbipy ligand through the nitrogen atoms only (κ 2 N,NЈ). When nearly quantitative amounts of ammonia are applied, two closely related complexes with the core motif [(smbipy)Cu(μ-OH) 2 Cu] form. Crystal structures of all complexes were obtained, and their features are discussed. Scheme 1. Examples of sulfonated ligands that do not show significant sulfonate binding towards metal centres.

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Section: Resultsmentioning

confidence: 71%

Na₂(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes

Oelkers

2014

Eur J Inorg Chem

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“…From the supramolecular point of view, the benzilate moiety has two phenyl rings oriented as propeller blades, and hydroxyl and carboxylate groups, which have the potential to form hydrogen bonds and interact with the charged field of a counter-ion. This fact has been evidenced in the structural characterization of some metal complexes studied with benzylic acid acting as the only ligand with Li + 13 , K + 14 , Tl + 15 and Pb 2+ 16 , or in conjunction with other ligands 6,[17][18][19][20] Precisely, in recent years, significant attention had been paid in designing and development of coordination polymers (CPs) which are certainly very promising as multifunctional materials [21][22][23] . The possibilities of packaging self-assembly mean that polymers can have unlimited structures and these varied structures can be prepared by choosing different metal ions or/and different ligands, and therefore these materials can have multiple applications in gas storage, heterogeneous catalysis, chemical sensors, energy conversion, drug delivery, among others 23 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure and Hirshfeld Surface Analysis of a New Coordination Polymer: Strontium Benzilate

Delgado

Mora

Ramírez

et al. 2021

J. Chil. Chem. Soc.

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A novel coordination polymer was synthesized from strontium carbonate and benzylic acid in aqueous solution and is formulated as Sr[(C6H5)4(COCOO)2•2H2O]. This compound was characterized by FTIR spectroscopy and powder X-ray diffraction. The crystal structure was determined by single-crystal X-ray diffraction. The complex crystallizes in the monoclinic P21/n space group, with unit cell parameters a = 15.0224(9) Å, b = 7.5038(6) Å, c = 25.000(2) Å,  = 94.764(2)º, V = 2808.4 Å 3 , Z = 4. In the structure, the metallic ion is coordinated to eight oxygen atoms, six from benzilate molecules, and two from water molecules, forming a distorted tetragonal antiprism. One of the benzilates is coordinated to the metal in a monodentate fashion (carboxylate only), while the other benzilate molecule does it in the bidentate from carboxylate and hydroxide. Strontium ions form infinite zigzag chains along the 010 direction, which form a three-dimensional network via O-H•••O hydrogen-bond interactions between the coordinated water molecules and the O atoms of the carboxylate groups. The intermolecular interactions were analyzed using Hirshfeld surface analysis.

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“…for C 48 H 52 Cu 4 N 12 O 28 (1499.18): C, 38.5; H, 3.5; N,11.2;Cu,16.9%. Found: C,38.5;H,3.3;N,11.3;Cu,16.2%. IR/(KBr, ν/cm À1 ): 3401 m,br, ν(OH); 1602 m, ν(CC); 1573 m, ν asym (CO 2 ); 1495w, 1448 m, ν(CC + CN); 1421 m, ν sym (CO 2 ); 1384vs, ν 3 (NO 3 À ); 1065 m, ν(CÀO); 814vw, ν 2 (NO 3 À ); 394w, ν(CuO); 289wd, ν(CuN). UVÀvis (ν/cm À1 ): 14430.…”

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confidence: 99%

Three-Dimensional Mixed-Ligand Coordination Polymers with Ferromagnetically Coupled Cyclic Tetranuclear Copper(II) Units Bonded by Weak Interactions

Balboa

Borrás

Brandi

et al. 2011

Crystal Growth & Design

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b S Supporting Information ' INTRODUCTIONResearch in metalÀorganic frameworks in recent years has been given impetus by the growth of two other closely related areas: crystal engineering and metallosupramolecular chemistry. 1 Crystal engineering seeks to understand why molecules pack in the ways that they do and to use that knowledge to deliberately engineer the arrangements of molecules in new materials. 2 This is important because the properties of materials are often governed by the way in which their constituent molecules are arranged. Control over this arrangement gives control over the properties of the material. The aim of supramolecular chemistry is similar, that is, to create assemblies of molecules. The process does not involve creating structures one atom at a time, but the design of molecules that, when combined, spontaneously self-assemble in a predetermined fashion to give larger architectures. 3 Coordination compounds with appropriate metalÀligand combinations are used to create molecular building blocks for self-organized systems with diverse topologies and potential applications. 4 In addition to covalent linkages between the building blocks, noncovalent intermolecular interactions ranging in strength from very strong hydrogen bonding to weak CÀH 3 3 3 A hydrogen bonds, 5 π interactions, 6 and, ultimately, van der Waals forces direct the formation of self-assembled structures of variable dimensions. 7 In particular, there has been considerable interest in the properties of polynuclear copper(II) complexes in order to understand the relationship between structure and magnetic properties. 8 Copper(II) complexes are also of interest because of their relevance as active site structures of metalloproteins. 9 It is well-known that a carboxylate group can bridge two metal ions to give rise to a wide variety of polynuclear complexes ranging from discrete entities to three-dimensional (3D) systems. 10 In these complexes, a carboxylate group can assume many types of bridging conformations, and, as expected, the magnetic properties

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(OC-6-32)-Diaquabis(glycolato)cobalt(II)

Cited by 4 publications

References 10 publications

Na₂(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes

Na₂(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes

Synthesis, Crystal Structure and Hirshfeld Surface Analysis of a New Coordination Polymer: Strontium Benzilate

Three-Dimensional Mixed-Ligand Coordination Polymers with Ferromagnetically Coupled Cyclic Tetranuclear Copper(II) Units Bonded by Weak Interactions

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(OC-6-32)-Diaquabis(glycolato)cobalt(II)

Cited by 4 publications

References 10 publications

Na2(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes

Na2(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes

Synthesis, Crystal Structure and Hirshfeld Surface Analysis of a New Coordination Polymer: Strontium Benzilate

Three-Dimensional Mixed-Ligand Coordination Polymers with Ferromagnetically Coupled Cyclic Tetranuclear Copper(II) Units Bonded by Weak Interactions

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Product

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Na₂(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes

Na₂(smbipy) – A Bipyridine‐Derived Ligand with Chelating Sulfonate Tags and Its 3d Metal Complexes