Cooperative binding of potassium cation and chloride anion by novel rhenium(I) bipyridyl amide crown ether receptors

1998 ◽  
pp. 231-232 ◽  
Author(s):  
James E. Redman ◽  
Paul D. Beer ◽  
Simon W. Dent ◽  
James E. Redman ◽  
Paul D. Beer ◽  
...  
Keyword(s):  
Crown Ether ◽  
Chloride Anion ◽  
Potassium Cation ◽  
Cooperative Binding

Ion Pair Cooperative Binding of Potassium Salts by New Rhenium(I) Bipyridine Crown Ether Receptors

2001 ◽  
Vol 40 (12) ◽  
pp. 2860-2869 ◽  
Author(s):  
Lindsay H. Uppadine ◽  
James E. Redman ◽  
Simon W. Dent ◽  
Michael G. B. Drew ◽  
Paul D. Beer
Keyword(s):  
Crown Ether ◽  
Ion Pair ◽  
Cooperative Binding ◽  
Potassium Salts

Polysulfonylamine, LI [1]. Synthese von zwei Kronenether-Komplexen des Kaliumdimesylamids und Kristallstruktur von [K(18-Krone-6)] [N(SO2CH3)2] • 2 CH3OH bei —95°C / Polysulfonylamines, LI. Synthesis of Two Crown Ether Complexes of Potassium Dimesylamide and Crystal Structure of [K(18-Crown-6)][N(SO2CH3)2] • 2 CH3OH at –95°C

1993 ◽  
Vol 48 (10) ◽  
pp. 1355-1359 ◽  
Author(s):  
Armand Blaschette ◽  
Firouz Safari ◽  
Karl-Heinz Nagel ◽  
Peter G. Jones
Keyword(s):  
Hydrogen Bond ◽  
Crown Ether ◽  
Ion Pairs ◽  
Mean Value ◽  
Methanol Molecule ◽  
Potassium Cation ◽  
Hydrogen Bond Donor ◽  
Orthorhombic Space Group ◽  
Hydrogen Bond Acceptor ◽  
Oxygen Atoms

The complexes [K(18-crown-6)][N(SO2CH3)2] and [K(dibenzo-18-crown-6)][N(SO2CH3)2] are obtained as white solids from equimolar methanolic solutions of KN(SO2CH3)2 and the appropriate crown ether. The former complex crystallizes at -25°C from methanol as a labile (1/2) solvate (title compound). The crystallographic data of the solvate at -95°C are: orthorhombic, space group P 212121, a = 848.2(4), b = 1233.2(4), c = 2496.6(10) pm, V = 2.612 nm3, Z = 4, Dx, = 1.373 Mg m-3. The structure in the solid state consists of ion pairs. The potassium cation is coordinated by the six oxygen atoms of the crown ether and two oxygen atoms belonging to different sulfonyl groups of the anion. The bond distances are K - O(crown) 274.2-297.1 (mean value 288.7), K-O(sulfonyl) 283.8 and 284.5 pm. The potassium ion lies 74 pm out of the best plane of the crown ether oxygen atoms. One methanol molecule acts as a hydrogen-bond donor towards the nitrogen atom of the anion and as a hydrogen-bond acceptor towards the second methanol molecule. The coronand displays the frequently observed symmetry D3d

Formation and Trapping of the Thermodynamically Unfavoured Inverted-Hemicucurbit[6]uril

2019 ◽  
Author(s):  
Elena Prigorchenko ◽  
Sandra Kaabel ◽  
Triin Narva ◽  
Anastassia Baškir ◽  
Maria Fomitšenko ◽  
...  
Keyword(s):  
Complex Formation ◽  
Combinatorial Chemistry ◽  
Trifluoroacetic Acid ◽  
Chloride Anion ◽  
Binding Affinities ◽  
Dynamic Covalent Chemistry ◽  
Reaction Selectivity ◽  
Low Concentration ◽  
Dynamic Combinatorial Chemistry ◽  
First Time

Amplification of a thermodynamically unfavoured macrocyclic product through the directed shift of the equilibrium between dynamic covalent chemistry library members is difficult to achieve. We show for the first time that during condensation of formaldehyde and <i>cis</i>-<i>N,N'</i>-cyclohexa-1,2-diylurea formation of <i>inverted-cis</i>-cyclohexanohemicucurbit[6]uril (<i>i-cis</i>-cycHC[6]) can be induced at the expense of thermodynamically favoured <i>cis</i>-cyclohexanohemicucurbit[6]uril (<i>cis</i>-cycHC[6]). The formation of <i>i-cis-</i>cycHC[6] is enhanced in low concentration of the templating chloride anion and suppressed in excess of this template. We found that reaction selectivity is governed by the solution-based template-aided dynamic combinatorial chemistry and continuous removal of the formed cycHC[6] macrocycles from the equilibrating solution by precipitation. Notably, the <i>i-cis</i>-cycHC[6] was isolated with 33% yield. Different binding affinities of three diastereomeric <i>i-cis</i>-, <i>cis</i>-cycHC[6] and their chiral isomer (<i>R,R</i>)-cycHC[6] for trifluoroacetic acid demonstrate the influence of macrocycle geometry on complex formation.

Preparation and Gas Sensitivity of Crown Ether Metal Complex Film Gas Sensor

2020 ◽  
Vol 2 (1) ◽  
pp. 1-12
Author(s):  
Gulgina Mamtimin ◽  
Halisa Arkin ◽  
Patima Nizamidin ◽  
Erkin Tursun ◽  
Abliz Yimit
Keyword(s):  
Crown Ether ◽  
Metal Complex ◽  
Gas Sensor ◽  
Gas Sensitivity ◽  
Complex Film

Synthesis of nickel selenites, their solubility and bonding in them

1982 ◽  
Vol 47 (8) ◽  
pp. 2069-2076 ◽  
Author(s):  
Miroslav Ebert ◽  
Zdeněk Mička ◽  
Ilona Peková
Keyword(s):  
Magnetic Properties ◽  
Hydrogen Bonding ◽  
Solubility Diagram ◽  
Reflectance Spectroscopy ◽  
Chloride Anion ◽  
Fluoride Anion ◽  
Infrared Absorption Spectroscopy ◽  
Magnetic Parameters ◽  
Nickel Cation ◽  
Spectrochemical Series

The solubility diagram of the NiSeO3-SeO2-H2O system at 25 °C was studied, and on its basis, Ni(HSeO3)2.2 H2O was prepared. This selenite and NiSeO3.2 H2O were investigated by infrared absorption spectroscopy and by electronic reflectance spectroscopy and their magnetic properties were determined. Based on the infrared spectra, the force constants of the selenium-oxygen bonds were determined and the hydrogen bonding was characterized. The electronic reflectance spectra and the magnetic parameters indicate an octahedral arrangement of the coordination sphere of the nickel cation and characterize the selenite anion as a ligand that in the spectrochemical series assumes a position between the fluoride anion and water and in the nephelauxetic series, between ethylenediamine and the chloride anion.

PEO-based electrolytes blended with star polymers with precisely imprinted polymeric pseudo-crown ether cavities for alkali metal ion batteries

2019 ◽  
Vol 576 ◽  
pp. 182-189 ◽  
Author(s):  
Zhuliu Xiao ◽  
Binghua Zhou ◽  
Jirong Wang ◽  
Cai Zuo ◽  
Dan He ◽  
...  
Keyword(s):  
Crown Ether ◽  
Alkali Metal ◽  
Metal Ion ◽  
Star Polymers ◽  
Alkali Metal Ion

Electrochemiluminescence of Ruthenium(II) Complexes Functionalized with Crown Ether Pendants and Effects of Cation Binding

2008 ◽  
Vol 47 (3) ◽  
pp. 1218-1223 ◽  
Author(s):  
Mei-Jin Li ◽  
Zuofeng Chen ◽  
Nianyong Zhu ◽  
Vivian Wing-Wah Yam ◽  
Yanbing Zu
Keyword(s):  
Crown Ether ◽  
Cation Binding
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