Coexisting covalent and non-covalent planar networks in the crystal structures of {[M(bipy)2(NO3)2]·arene}n (M = Ni, 1; Co, 2; arene = chlorobenzene, o-dichlorobenzene, benzene, nitrobenzene, toluene or anisole) †

Biradha, Kumar; Mondal, Arunendu; Moulton, Brian; Zaworotko, Michael J.

doi:10.1039/b003733h

Cited by 68 publications

(52 citation statements)

References 34 publications

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“…Further expansion of the structure by propagation of this symbiotic unit constituting of complementary stacking and coordination portions is impossible since the significantly contracted [Co(HCOO)] 4 core evidently can not afford regular polymeric array, cf. 2D net seen in 2. Notable, in this context, that aromatic species themselves easily form different supramolecular arrays that can exist as 2D stacks or even interpenetrate with 2D coordination polymers [17,18].…”

Section: Resultsmentioning

confidence: 99%

Molecular “Multi-rod Cable” {[Co(NC5H4-CH=CH-C6H4-CH=CH-C5H4N)(HCOO)2]8}n: A Novel Supramolecular Architecture by Cooperation of Coordination and Stacking Interactions

Domasevitch¹,

Sieler²,

Русанов³

et al. 2002

Z. anorg. allg. Chem.

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The cobalt-formate coordination polymers {[Co-(bpyph)(HCOO) 2 ] 8 } n (1) (bpyph = 1,4-bis(2-(4-pyridyl)ethenyl)benzene) and {[Co(HCONH 2 ) 2 (HCOO) 2 ]} n (2) have been prepared by interaction of Co(NO 3 ) 2´6 H 2 O in formamide solution with generation of formate anion by hydrolysis of the solvent. Coordination polymer 1 reveals an unprecedented example of ªmolecular multi-rod cableº architecture, in which eight single ªmolecular wiresº {[Co(bpyph)]} n are interlinked by bridging formate anions to give infinite octameric chains. The formate groups adopt mono-, and biand tridentate bridging and chelate modes of coordination (Co±O 1.966±2.134 A Ê ). The coordination geometry around the cobalt atoms is essentially dominated by the demands for most effective packing of parallel situated polycyclic aromatic ligands, with extensive CH´´´p, or edge-to-face stacking interactions within the single octameric chain as well as between the closest neighbours (C´´´C separations within this stack are ca. 3.50 A Ê ). Ein mehradriges molekularesKabel ± eine neuartige supramolekulare Architektur durch Kooperation von Koordinations-und Stapelwechselwirkung Inhaltsu È bersicht. Die Koordinationspolymere der Cobaltformiate {[Co(bpyph)(HCOO) 2 ] 8 } n (1) (bpyph = 1,4-bis(2-(4-pyridyl)ethenyl)benzol) und {[Co(HCONH 2 ) 2 (HCOO) 2 ]} n (2) wurden durch Reaktion von Co(NO 3 ) 2´6 H 2 O mit einer Formamidlo È sung unter Bildung des Formiatanions durch Hydrolyse des Lo È sungsmittels synthetisiert. Das Koordinationspolymer 1 zeigt eine neuartige Architektur eines molekularen, mehradrigen Kabels, in welchem acht ªmolekulare Dra È hteº {[Co(bpyph)]} n durch verbru È ckende Formiatanionen verknu È pft sind. Die Formiatgruppe bildet ein-, zwei-oder dreiza È hlige verbru È ckende und chelatisierende Koordinationsmodi aus (Co±O 1.966±2.134 A Ê ). Die Koordinationsgeometrie des Cobaltatoms wird im wesentlichen dominiert durch effektive Packung der parallel angeordneten polycyclischen aromatischen Liganden mit ausgepra È gten CH´´´p-Wechselwirkungen oder Kanten zu Fla È chen Stapelungen innerhalb der einzelnen oktameren Ketten als auch zwischen den engsten Nachbarn (C´´´C-Absta È nde innerhalb der Stapel betragen ca. 3.50 A Ê ).

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Section: Resultsmentioning

confidence: 99%

Molecular “Multi-rod Cable” {[Co(NC5H4-CH=CH-C6H4-CH=CH-C5H4N)(HCOO)2]8}n: A Novel Supramolecular Architecture by Cooperation of Coordination and Stacking Interactions

Domasevitch¹,

Sieler²,

Русанов³

et al. 2002

Z. anorg. allg. Chem.

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“…36 The complementary coordination and aromatic networks interpenetrate in a manner described as parallel/diagonal inclined interpenetration as illustrated in Figure 10 for {[Ni(bipy) 2 (NO 3 ) 2 ]·chlorobenzene} n , 10.…”

Section: Catananes or Interpenetrated Networkmentioning

confidence: 99%

Supramolecular Isomerism

Bourne¹

2012

Supramolecular Chemistry

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Supramolecular isomers comprise network structures that have identical chemical compositions but differ from one another in their structure. In some instances, the term is also used to describe identical frameworks that contain different counterions, solvent, or guest molecules. Supramolecular isomerism can be observed in both molecular and coordination compounds. Like polymorphism, it results when different, but energetically similar, packing interactions can operate during crystallization. Gaining control on crystallization of a particular isomer remains challenging as both thermodynamic and kinetic factors play a role, and as understanding the full energy profile of a self‐assembly process is extremely difficult. Some important variables within the crystallization system have been identified, including chemical and physical factors, which are described in this chapter. Supramolecular isomers may be considered in four categories: structural, conformational, interpenetrated, and chiral networks. Examples of each are provided. A number of topological approaches have been described over the years, which aid in the description of extended structures. Both graph set and network analyses are useful for this purpose. Crystal engineering aims to control structural characteristics of crystalline materials, with the aim of having greater control over their physical properties. Although hydrogen‐bonded supramolecular synthons have been studied in depth for more than a decade and although coordination bonds are stronger and more directional than other supramolecular interactions, structural uncertainty is still a characteristic of self‐assembled systems. Some structure‐property relationships are emerging, including luminescence and porosity.

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“…The bond lengths associated with the metal atoms in both complexes are within the range reported for Ni II complexes with similar coordinating atoms. [32][33][34][35][36][37][38][39] However, the average Ni-O suc and Ni-N bipy bonds are shorter, and Ni-O water bonds are longer in 1 compared to those in 2 (see Tables 1 and 2). It is possible that these differences in the bond lengths and the variation of the helicity of the Ni-suc chain in the two complexes are due to the high pressure conditions used for the synthesis of 1.…”

Section: Introductionmentioning

confidence: 99%

Nickel(II) Coordination Polymers – 4,4′‐Bipyridine‐Connected Six‐ and Four‐Fold Metal–Succinate Helices and Their Corresponding Chiral and Achiral Networks

2011

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The reaction of equimolar amounts of Ni(NO3)2·6H2O, Na2(suc)·6H2O (suc = succinate) and 4,4′‐bipyridine (bipy) under different conditions yield the coordination polymers [Ni(suc)(bipy)(H2O)2]n·2nH2O (1) and [Ni(suc)(bipy)(H2O)2]n·nH2O (2). The complexes were characterized by elemental analysis, spectroscopic, thermogravimetric, and magnetic susceptibility measurements. Crystal structures reveal that the metal centers in both complexes are in a distorted octahedral N2O4 coordination sphere assembled by mutually trans pairs of 4,4′‐bipyridine, succinate, and water molecules. The helical metal–succinate chains have a right‐handed sixfold configuration in 1, with guest water molecules inside the helix, and both right‐ and left‐handed fourfold configurations in 2, with guest water molecules outside the helix. The parallel helical substructures are connected by 4,4′‐bipyridine and provide 3D chiral 75.9 and achiral 65.8 networks in 1 and 2, respectively.

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Coexisting covalent and non-covalent planar networks in the crystal structures of {[M(bipy)2(NO3)2]·arene}n (M = Ni, 1; Co, 2; arene = chlorobenzene, o-dichlorobenzene, benzene, nitrobenzene, toluene or anisole) †

Cited by 68 publications

References 34 publications

Molecular “Multi-rod Cable” {[Co(NC5H4-CH=CH-C6H4-CH=CH-C5H4N)(HCOO)2]8}n: A Novel Supramolecular Architecture by Cooperation of Coordination and Stacking Interactions

Molecular “Multi-rod Cable” {[Co(NC5H4-CH=CH-C6H4-CH=CH-C5H4N)(HCOO)2]8}n: A Novel Supramolecular Architecture by Cooperation of Coordination and Stacking Interactions

Supramolecular Isomerism

Nickel(II) Coordination Polymers – 4,4′‐Bipyridine‐Connected Six‐ and Four‐Fold Metal–Succinate Helices and Their Corresponding Chiral and Achiral Networks

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