Superphenylphosphines: Nanographene-Based Ligands That Control Coordination Geometry and Drive Supramolecular Assembly

2018 ◽  
Vol 140 (3) ◽  
pp. 1131-1141 ◽  
Author(s):  
Jordan N. Smith ◽  
James M. Hook ◽  
Nigel T. Lucas
Keyword(s):  
Supramolecular Assembly ◽  
Coordination Geometry

Influence of N-heteroaromatic π–π stacking on supramolecular assembly and coordination geometry; effect of a single-atom change in the ligand

2015 ◽  
Vol 44 (12) ◽  
pp. 5488-5502 ◽  
Author(s):  
Hamid Reza Khavasi ◽  
Bahareh Mir Mohammad Sadegh
Keyword(s):  
Coordination Compounds ◽  
Crystal Packing ◽  
Supramolecular Assembly ◽  
Single Atom ◽  
Coordination Geometry ◽  
Geometry Effect ◽  
Π Interactions ◽  
Π Stacking ◽  
Nitrogen Heteroatom ◽  
Aromatic Systems

A study on how the polarization of aromatic systems, through the introduction of a nitrogen heteroatom, affects the π–π interactions and crystal packing of mercury coordination compounds.

scholarly journals Correction: Influence of N-heteroaromatic π–π stacking on supramolecular assembly and coordination geometry; effect of a single-atom change in the ligand

2015 ◽  
Vol 44 (21) ◽  
pp. 10097-10097
Author(s):  
Hamid Reza Khavasi ◽  
Bahareh Mir Mohammad Sadegh
Keyword(s):  
Supramolecular Assembly ◽  
Single Atom ◽  
Coordination Geometry ◽  
Dalton Trans ◽  
Geometry Effect ◽  
Π Stacking

Correction for ‘Influence of N-heteroaromatic π–π stacking on supramolecular assembly and coordination geometry; effect of a single-atom change in the ligand’ by Hamid Reza Khavasi et al., Dalton Trans., 2015, 44, 5488–5502.

scholarly journals A new Pu(iii) coordination geometry in (C5H5NBr)2[PuCl3(H2O)5]·2Cl·2H2O as obtained via supramolecular assembly in aqueous, high chloride media

2017 ◽  
Vol 53 (78) ◽  
pp. 10816-10819 ◽  
Author(s):  
Robert G. Surbella ◽  
Lucas C. Ducati ◽  
Kristi L. Pellegrini ◽  
Bruce K. McNamara ◽  
Jochen Autschbach ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Supramolecular Assembly ◽  
Electrostatic Potentials ◽  
Coordination Geometry ◽  
Covalent Interaction ◽  
High Chloride

A novel hydrated Pu(iii) chloride, (C5H5NBr)2[PuCl3(H2O)5]·Cl·2H2O, is prepared from aqueous media and the non-covalent interaction pairings are rationalized using electrostatic potentials.

Design and synthesis of methyl 2-{[4-phenyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetate (phpy2NS) as a ligand for complexes of Group 12 elements: structural assessment and hydrogen-bonded supramolecular assembly analysis

2019 ◽  
Vol 75 (7) ◽  
pp. 891-903 ◽  
Author(s):  
Alfonso Castiñeiras ◽  
Isabel García-Santos ◽  
Manuel Saa
Keyword(s):  
Crystal Packing ◽  
Noncovalent Interactions ◽  
Three Dimensional ◽  
Supramolecular Assembly ◽  
Chloroacetic Acid ◽  
Structural Diversity ◽  
Coordination Geometry ◽  
Metal Centre ◽  
Design And Synthesis ◽  
Cadmium Bromide

The reaction of 2-cyanopyridine with N-phenylthiosemicarbazide afforded 2-[amino(pyridin-2-yl)methylidene]-N-phenylhydrazine-1-carbothioamide (Ham4ph) and crystals of 4-phenyl-5-(pyridin-2-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione (pyph3NS, 1, C13H10N4S). Crystals of methyl 2-{[4-phenyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetate (phpy2NS, 2, C16H14N4O2S), derived from 1, were obtained by the reaction of Ham4ph with chloroacetic acid, followed by the acid-catalyzed esterification of the carboxylic acid with methyl alcohol. Crystals of bis(methanol-κO)bis(methyl 2-{[4-phenyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl-κ2 N 1,N 5]sulfanyl}acetato)zinc(II)/cadmium(II) hexabromidocadmate(II), [Zn0.76Cd0.24(C16H14N4O2S)2(CH3OH)2][Cd2Br6] or [Zn0.76Cd0.24(phpy2NS)2(MeOH)2][Cd2Br6], 3, and dichlorido(methyl 2-{[4-phenyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl-κ2 N 1,N 5]sulfanyl}acetato)mercury(II), [HgCl2(C16H14N4O2S)] or [Hg(phpy2NS)Cl2], 4, were synthesized using ligand 2 and CdBr2 or HgCl2, respectively. The molecular and supramolecular structures of the compounds were studied by X-ray diffractometry. The asymmetric unit of 3 is formed from CdBr3 and M(phpy2NS)(MeOH) units, where the metal centre M has a 76% occupancy of ZnII and 24% of CdII. The M 2+ centre of the cation, located on a crystallographic inversion centre, is hexacoordinated and appears as a slightly distorted octahedral [MN4O2]2+ cation. The Cd centre of the anion is coordinated by two terminal bromide ligands and two bridging bromide ligands that generate [Cd2Br6]2− cadmium–bromide clusters. These clusters display crystallographic inversion symmetry forming two edge-shared tetrahedra and serve as agents that direct the structure in the formation of supramolecular assemblies. In mononuclear complex 4, the coordination geometry around the Hg2+ ion is distorted tetrahedral and comprises two chloride ligands and two N-atom donors from the phpy2NS ligand, viz. one pyridine N atom and the other from triazole. In the crystal packing, all four compounds exhibit weak intermolecular interactions, which facilitate the formation of three-dimensional architectures. Along with the noncovalent interactions, the structural diversity in the complexes can be attributed to the metal centre and to the coordination geometry, as well as to its ionic or neutral character.

Influence of accompanying anions on supramolecular assembly and coordination geometry in HgII complexes with 8-aminoquinoline: experimental and theoretical studies

CrystEngComm ◽  
2013 ◽  
Vol 15 (7) ◽  
pp. 1404 ◽  
Author(s):  
M. Mirzaei ◽  
H. Eshtiagh-Hosseini ◽  
M. Mohammadi Abadeh ◽  
M. Chahkandi ◽  
A. Frontera ◽  
...  
Keyword(s):  
Supramolecular Assembly ◽  
Theoretical Studies ◽  
Coordination Geometry ◽  
Experimental And Theoretical Studies

Control of copper(II) coordination geometry via supramolecular assembly of ligands in the solid state

1999 ◽  
pp. 1107-1108 ◽  
Author(s):  
David J. White ◽  
Leroy Cronin ◽  
Simon Parsons ◽  
Neil Robertson ◽  
Peter A. Tasker ◽  
...  
Keyword(s):  
Solid State ◽  
Supramolecular Assembly ◽  
Coordination Geometry

scholarly journals Chiral stimuli-responsive metallo-supramolecular assembly induced by CuII/CuI redox change

2020 ◽  
Vol 56 (61) ◽  
pp. 8703-8706
Author(s):  
Maya Marinova ◽  
Antoine Bonnefont ◽  
Thierry Achard ◽  
Aline Maisse-François ◽  
Stéphane Bellemin-Laponnaz
Keyword(s):  
Metal Complexes ◽  
Supramolecular Assembly ◽  
Coordination Geometry ◽  
Stimuli Responsive ◽  
Redox Change ◽  
Selective Formation

We investigated the selective formation of homoleptic and heteroleptic metal complexes controlled by means of the chiral molecular instruction of the ligand and the coordination geometry of the metal.

The 3-Dimensional Molecular Structure of the Actin Filament Revisited

1985 ◽  
Vol 43 ◽  
pp. 480-481
Author(s):  
U. Aebi ◽  
R. Millonig ◽  
H. Salvo
Keyword(s):  
Actin Filament ◽  
Supramolecular Assembly ◽  
Specimen Preparation ◽  
X Ray Diffraction ◽  
Single Filament ◽  
X Ray ◽  
3 Dimensional ◽  
Filament Diameter ◽  
Preparation Conditions ◽  
Apparent Diameter

To date, most 3-D reconstructions of undecorated actin filaments have been obtained from actin filament paracrystal data (for refs, see 1,2). However, due to the fact that (a) the paracrystals may be several filament layers thick, and (b) adjacent filaments may sustantially interdigitate, these reconstructions may be subject to significant artifacts. None of these reconstructions has permitted unambiguous tracing or orientation of the actin subunits within the filament. Furthermore, measured values for the maximal filament diameter both determined by EM and by X-ray diffraction analysis, vary between 6 and 10 nm. Obviously, the apparent diameter of the actin filament revealed in the EM will critically depend on specimen preparation, since it is a rather flexible supramolecular assembly which can easily be bent or distorted. To resolve some of these ambiguities, we have explored specimen preparation conditions which may preserve single filaments sufficiently straight and helically ordered to be suitable for single filament 3-D reconstructions, possibly revealing molecular detail.

Supramolecular Assembly of U(IV) Clusters and Superatoms

2020 ◽  
Author(s):  
Ian Colliard ◽  
Gregory Morrosin ◽  
Hans-Conrad zur Loye ◽  
May Nyman
Keyword(s):  
Quantum Dots ◽  
Supramolecular Assembly ◽  
Emergent Properties ◽  
Organic Media ◽  
Body Centered Cubic ◽  
Cluster Anions ◽  
Charge Balance ◽  
Interpenetrating Networks ◽  
Hierarchical Assembly ◽  
Two Parameters

Superatoms are nanometer-sized molecules or particles that can form ordered lattices, mimicking their atomic counterparts. Hierarchical assembly of superatoms gives rise to emergent properties in superlattices of quantum-dots, p-block clusters, and fullerenes. Here, we introduce a family of uranium-oxysulfate cluster anions whose hierarchical assembly in water is controlled by two parameters; acidity and the countercation. In acid, larger Ln<sup>III</sup> (Ln=La-Ho) link hexamer (U<sub>6</sub>) oxoclusters into body-centered cubic frameworks, while smaller Ln<sup>III</sup> (Ln=Er-Lu &Y) promote linking of fourteen U<sub>6</sub>-clusters into hollow superclusters (U<sub>84</sub> superatoms). U<sub>84</sub> assembles into superlattices including cubic-closest packed, body-centered cubic, and interpenetrating networks, bridged by interstitial countercations, and U<sub>6</sub>-clusters. Divalent transition metals (TM=Mn<sup>II </sup>and Zn<sup>II</sup>), with no added acid, charge-balance and promote the fusion of 10 U<sub>6</sub> and 10 U-monomers into a wheel–shaped cluster (U<sub>70</sub>). Dissolution of U<sub>70</sub> in organic media reveals (by small-angle Xray scattering) that differing supramolecular assemblies are accessed, controlled by TM-linking of U<sub>70</sub>-clusters. <br>

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