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Monday, July 13, 2020 | History

2 edition of Interaction of metal salts with polyethers. found in the catalog.

Interaction of metal salts with polyethers.

Farahman Hakiempoor

Interaction of metal salts with polyethers.

by Farahman Hakiempoor

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Published by University of Aston. Department of Chemistry in Birmingham .
Written in English


Edition Notes

Thesis (PhD) - University of Aston in Birmingham, 1985.

ID Numbers
Open LibraryOL13877183M

Figure 7. Rotaxane based derivative consists of one (or more) axles threaded through one (or more) rings. Bulky groups at each end of the axle prevents the ring from dethreading. - "Supramolecular Chemistry From Molecule to Molecular Machines". Salts of metal ions such as mercury(II), lead(II), and silver can form strong bonds with disulfide groups of the protein. Thus, they disrupt both disulfide bridges and salt linkages and cause the protein to precipitate out of solution as an insoluble metal-protein salt. This property makes some of the heavy metal salts .

- Explore ceramicartcommu's board "Water Soluble Metal Salt Effects", followed by people on Pinterest. See more ideas about Metal salts, Ceramics, Ceramic sculpture pins.   The most reactive metal displaces the less reactive metal from its salt solution. > Metal salts are coloured > Reaction of Metals with Salt Solution (i) Salt solution CuSO 4. As Al, Zn and Fe can displace Cu from its salt solution hence, all three are more reactive than Cu. (ii) Salt solution FeSO 4.

Herein we report a detailed investigation of alkali- and alkaline earth metal salts in combination with polyethers as catalytic systems for the synthesis of cyclic carbonates from epoxides and CO2. Charles E. Carraher Jr's 99 research works with citations and reads, including: Production of organometallic polymers by the interfacial technique. XXI. A study of some associated reaction.


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Interaction of metal salts with polyethers by Farahman Hakiempoor Download PDF EPUB FB2

Inorganica Chimica Acta, () Complexation of metal salts with macrocyclic polyethers in aprotic organic solvents. Crystal structures of Interaction of metal salts with polyethers.

book complexes [CuCl 1 5-CCH3CN]2[Cu2C16] and {[Cu C-5(CH3CN)2][ Cu3 C18] }n V. Belsky, N. Streltsova L. Karpov Physico-Chemical Research Institute, Moscow (U.S.S.R.) O.

Kireeva, B. Bulychev* and Cited by: Interaction of anhydrous CoCl 2 with crown-5 in acetonitrile medium leads to the formation in solution and in the crystal of ionic compounds of three structural types: [CoC-52AN][CoCl 3 AN] 2 AN,[CoC-5(AN) 2][CoCl 4]AN and [CoC-5(AN) 2][Co 2 Cl 6].The complex formation has been studied by conductometric and spectrophotometric titration, but individual compounds by Cited by:   Interaction of anhydrous or partially hydrated zinc chloride with the macrocyclic polyether crown-5 in aprotic organic solvents was found to yield intracavity ionic complex salts of two types, [Zncrown-52L] 2+ [Zn 2 Cl 6] 2− and [ZnCl crown-5L′] 2 + [Zn 2 Cl 6] 2− (L = CH 3 CN, THF; L′ = H 2 O, CH 3 COCH 3).

crown-6 in THF and CH 3 CN failed to react with anhydrous Cited by: Interaction with metal salts of homopolymer or copolymers of a vinyl compound carrying linear tripeptide as a substituent.

International Journal of Biological Macromolecules7 (1), Cited by: Interaction of metal salts with polyethers. By and a variety of their salt complexes have been studied through the measurement of the dielectric permittivity and dielectric loss over a range of frequency and temperature.

The major proportion of this study has been concerned with the examination of the nature of the interaction between Author: Farahman Hakiempoor.

Interaction of metal salts with polyethers Author: Hakiempoor, Farahman ISNI: Awarding Body: University of Aston in Birmingham Current Institution: Aston University Date of Award: Availability of Full Text: Access from EThOS.

Crystal structures of complexes between alkali-metal salts and cyclic polyethers. Part V. The 1: 2 complex formed between potassium iodide and 2,3,5,6,8,9,11,octahydro-1,4,7,10,benzopentaoxacyclopentadecin (benzocrown-5).

Ammonium salts were more successful in the sense that much higher molar masses could be achieved in a controlled manner, especially at −30 °C, yielding polyethers of low dispersity (e.g.

D = for M n =g/mol). The strong decrease of transfer reactions was explained by the decrease of basicity of the active bi-component complex.

In this study, we report on a novel approach for the crystallization of previously elusive rubidium and caesium salts. Stirring alkali metal salts in dichloromethane together with sila-polyethers such as 8,9-disila-EO5 (1) (EO5 = pentaethylene glycol), 11,disila-EO7 (2) (EO7 = heptaethylene glycol) and 1,2,10,tetrasila[18]crown-6 (3) under an inert-gas atmosphere yields crystalline.

Cation electrophilic catalysis has been studied in nucleophilic substitution reactions of octyl methanesulfonate (1) promoted by complexes of macrocyclic polyethers 2–5 with alkali and alkaline-earth metal salts in chlorobenzene.

The catalytic effect. Herein, we report a detailed investigation of alkali and alkaline earth metal salts in combination with polyethers as catalytic systems for the synthesis of cyclic carbonates from epoxides and CO2. CaI2 showed superior activity compared to various other tested alkali and alkaline earth metal salts.

Interestingly, in contrast to other catalytic protocols, the presence of hydroxyl groups. The bridged macrocyclic polyether (1b) having 9 donor oxygen atoms forms water soluble complexes of stoicheiometry with potassium and caesium salts, however polyethers (1a) and (2a) with 8 donor oxygen atoms, having shorter bridges, give complexes with caesium chloride while maintaining complexes with potassium salts; in the crystalline form of a typical complex, KCl(2a)n(H.

The crystal structure of the title complex determined from three-dimensional diffractometer data. = 4 in an orthorhambic unit cell having = 12, = 9, = 15 Å, and space group Full-matrix least-squares refinement based on observations has led to.

For compounds A and B to mix, the A/B interaction must be as great or greater than either the A/A interactions or the B/B interactions. A polar solvent like water can form hydration spheres around the cations and anions of the metal salt. This red. Goldberg, I.:Structure and Binding in Molecular Complexes of Cyclic Polyethers.

C.J.:Cyclic Polyethers and Their Complexes with Metal Salts, J. Amer. Chem. Soc. 89, – () Cation Selectivities Shown by Cyclic Polyethers and Their THIA Derivatives. In: Pullman B., Goldblum N.

(eds) Metal-Ligand Interactions in. Interaction of polymyxin B nonapeptide with anionic phospholipids. groups at both ends of oligoethylene glycols on the conformational stabilization of their complexes with alkali metal salts. 1 H NMR Studies on the Interactions of Acyclic Polyethers with Dimethyltin Bichloride in.

Effect of concentration of salts and of the charge of metal ion on swelling behavior, composition and structure of the gels of poly(2-acrylamidemethylpropanesulfonic acid) (PAMPS) salts in aqueous medium was studied. In the solutions of sodium and calcium chlorides the gel is swollen whereas in the presence of cobalthexammine(III) or iron(III) chlorides it collapses.

Goldberg, I.:Structure and Binding in Molecular Complexes of Cyclic Polyethers. C.J.:Cyclic Polyethers and Their Complexes with Metal Salts, J. Amer. Chem. Soc. 89, () Cation Selectivities Shown by Cyclic Polyethers and Their Thia Derivatives. In: Pullman B., Goldblum N. (eds) Metal-Ligand Interactions in Organic.

Two ion‐transport mechanisms are described for ion transport in polyether‐alkali metal salt complexes: an intrahelical jumping process along crystalline (helical) regions of the polymer, and a transport process in the amorphous regions which is dependent on formation of fourfold coordination sites via mutual motion of ether oxygens from two or more polymer chains.

A smectic phase was induced for the mixture of the non-mesomorphic polyethers with alkali metal salt, and the mesomorphic temperature range for the mixed system of the polyethers became wider with.

Structural studies of tetrazoles. Crystal and molecular structure and ab initio calculations of 1-phenyl-1H-tetrazolethiolate, as its [diaqua(crown-6)sodium] salt: An anionic tetrazole free of direct metal interactions.

Heteroatom Chemistry8 (4), interactions, a relatively small metal ion Mn+ and transform it into a large, more lipophilic cationic species. This allows the solubilization in non aqueous media of a number of metal salts, as (Mn+⊂ Lig)nY-ion pair, and their transfer from an aqueous to an immiscible organic phase.Crown ethers are cyclic chemical compounds that consist of a ring containing several ether groups.

The most common crown ethers are cyclic oligomers of ethylene oxide, the repeating unit being ethyleneoxy, i.e., –CH 2 CH 2 O–. Important members of this series are the tetramer (n = 4), the pentamer (n = 5), and the hexamer (n = 6).The term "crown" refers to the resemblance between the.