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Cluster control in oligouranyl complexes of p-t-butylcalix[8]arene

Identifieur interne : 007111 ( Main/Exploration ); précédent : 007110; suivant : 007112

Cluster control in oligouranyl complexes of p-t-butylcalix[8]arene

Auteurs : Jack M. Harrowfield [France] ; Mark I. Ogden [Australie] ; Brian W. Skelton [Australie] ; Allan H. White [Australie]

Source :

RBID : ISTEX:FD9D465A978C9981ADCDD000992D78C72A333585

English descriptors

Abstract

Formation of uranyl ion complexes of p-t-butylcalix[8]arene by reaction of the calixarene with [UO2(dmso)5]2+ in the presence of various bases leads to the crystallisation of solids with interestingly different stoichiometry, involving both di- and tri-uranate oligomers bound to the calixarene in anionic species. In all, the calixarene hexa-anion is present in a virtually identical conformation, suggesting that conformational preferences of the ligand must be a major factor controlling the form of the bound oxo-metal complex. Hydrogen bonding to the anions does not appear to be prominent even in the presence of protonated amines and this may explain the formation of some remarkable cation/solvent/simple anion clusters found within the lattices.

Url:
DOI: 10.1039/c0dt00667j


Affiliations:


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Le document en format XML

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<term>Acetonitrile</term>
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<term>Aromatic rings</term>
<term>Asymmetric unit</term>
<term>Calixarene</term>
<term>Calixarene anions</term>
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<term>Calixarene ligand</term>
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<term>Cation</term>
<term>Central oxygen atom</term>
<term>Chem</term>
<term>Conformation</term>
<term>Convergent atoms</term>
<term>Crystallographic symmetry</term>
<term>Dalton trans</term>
<term>Diffraction studies</term>
<term>Diuranate</term>
<term>Divergent atoms</term>
<term>Dmso solution</term>
<term>Equatorial</term>
<term>Equatorial plane</term>
<term>Hydrogen atoms</term>
<term>Initial reaction mixture</term>
<term>Lewis base</term>
<term>Ligand</term>
<term>Metal ions</term>
<term>Mirror plane</term>
<term>Oxygen atoms</term>
<term>Pentagonal bipyramidal</term>
<term>Phenolic oxygen atoms</term>
<term>Present examples</term>
<term>Present work</term>
<term>Protonation state</term>
<term>Ring size</term>
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<term>Royal society</term>
<term>Same side</term>
<term>Solvent components</term>
<term>Solvent molecules</term>
<term>Space group</term>
<term>Structure determinations</term>
<term>Tetramethylammonium hydroxide</term>
<term>Thermal ellipsoids</term>
<term>Trans</term>
<term>Triethylammonium salt</term>
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<term>Uranyl</term>
<term>Uranyl units</term>
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<term>Calixarene anions</term>
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<term>Calixarene ligand</term>
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<term>Divergent atoms</term>
<term>Dmso solution</term>
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<term>Equatorial plane</term>
<term>Hydrogen atoms</term>
<term>Initial reaction mixture</term>
<term>Lewis base</term>
<term>Ligand</term>
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<term>Pentagonal bipyramidal</term>
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<term>Present work</term>
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<term>Solvent components</term>
<term>Solvent molecules</term>
<term>Space group</term>
<term>Structure determinations</term>
<term>Tetramethylammonium hydroxide</term>
<term>Thermal ellipsoids</term>
<term>Trans</term>
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<div type="abstract">Formation of uranyl ion complexes of p-t-butylcalix[8]arene by reaction of the calixarene with [UO2(dmso)5]2+ in the presence of various bases leads to the crystallisation of solids with interestingly different stoichiometry, involving both di- and tri-uranate oligomers bound to the calixarene in anionic species. In all, the calixarene hexa-anion is present in a virtually identical conformation, suggesting that conformational preferences of the ligand must be a major factor controlling the form of the bound oxo-metal complex. Hydrogen bonding to the anions does not appear to be prominent even in the presence of protonated amines and this may explain the formation of some remarkable cation/solvent/simple anion clusters found within the lattices.</div>
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