Silver and Thallium Ion Complexation with Allyloxycalix[4]arenes

1999 ◽  
Vol 52 (3) ◽  
pp. 227 ◽  
Author(s):  
Daniel Couton ◽  
Mauro Mocerino ◽  
Chris Rapley ◽  
Chitoshi Kitamura ◽  
Akio Yoneda ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Functional Groups ◽  
Cation Binding ◽  
Cone Conformation ◽  
Conformational Rigidity ◽  
Phenolic Oxygen ◽  
Ion Complexation ◽  
Oxygen Atoms

A series of six calix[4]arene derivatives bearing allyl groups and/or benzyl groups functionalized at the phenolic oxygen atoms were synthesized and their cation-binding abilities for silver(I) and thallium(I) ions were evaluated through solvent extraction experiments. The results showed that both silver(I) and thallium(I) picrates were readily extracted by the tetrasubstituted p-t-butylcalixarene derivatives, while no extraction of sodium or potassium picrates was observed. The high extractability of thallium(I) picrate by these ligands was independent of the functional groups present, but the extraction of silver picrate seemed to be dependent on the conformational rigidity of the calixarene; those locked into the cone conformation showed the highest extractability for silver picrate.

Solvent Extraction of Some Metal Ions with Lipophilic Chitosan Chemically Modified with Functional Groups of Dithiocarbamate

2001 ◽  
Vol 30 (7) ◽  
pp. 698-699 ◽  
Author(s):  
Katsutoshi Inoue ◽  
Kazuharu Yoshizuka ◽  
Keisuke Ohto ◽  
Hirofumi Nakagawa
Keyword(s):  
Solvent Extraction ◽  
Metal Ions ◽  
Functional Groups ◽  
Chemically Modified

Structural Systematics of 2/4-Nitrophenoxide Complexes of Closed-Shell Metal Ions. VI 4-Nitrophenoxides of Group 2

1998 ◽  
Vol 51 (8) ◽  
pp. 775 ◽  
Author(s):  
Jack M. Harrowfield ◽  
Raj Pal Sharma ◽  
Brian W. Skelton ◽  
Paloth Venugopalam ◽  
Allan H. White
Keyword(s):  
Metal Ions ◽  
Closed Shell ◽  
Water Molecules ◽  
One Dimensional ◽  
Phenolic Oxygen ◽  
C 23 ◽  
Structure Determinations ◽  
Group 2 ◽  
Coordinated Water ◽  
Oxygen Atoms

Room-temperature single-crystal X-ray structure determinations are recorded for 4-nitrophenolate (4-np-) salts of Group 2 metal ions, variously hydrated, M(4-np)2.xH2O, M = Mg, Ca, Sr, Ba. Mg(4-np)2.8H2 O is monoclinic, P21/c, a 12·402(3), b 6·673(7), c 11·833(6) Å, β 93·70(3)°, Z = 2; conventional R on |F| was 0·041 for No 1995 independent ‘observed’ (I > 3σ(I)) reflections. Ca(4-np)2.4H2O is monoclinic, P21/c, a 13·109(8), b 3·644(1), c 21·181(8) Å, β 125·55(3)°, Z= 2, R 0·050 for No 1371. Sr(4-np)2.8H2O is monoclinic, P21/n, a 7·934(1), b 10·658(1), c 23·602(2) Å, β 91·36(1)°, Z = 4, R 0·038 for No 2050. Ba(4-np)2.8H2O is monoclinic P21/c, a 15·990(8), b 6·337(3), c 25·634(8) Å, β 126·1(3)°, Z = 4, R 0·021 for No 3115. The magnesium salt is ionic with [Mg(OH2)6]2+ cations and interleaved anion stacks up b. The calcium salt is a one-dimensional polymer with ... Ca(µ-O)2Ca(µ-O)2Ca ... spine, the bridges being phenolic oxygen atoms.trans-Coordinated water molecules make up six-coordination about the calcium, the anion planes stacking at the b spacing. The strontium adduct is also a one-dimensional polymer with a similar spine, but with water molecule oxygen atoms bridging, the nine-coordinate strontium environment being made up by a chelating nitro group and three unidentate water molecules. Coordinated anions stacked up a are interleaved by free anions. The barium salt is simply [Ba(4-np)(OH2)8]+ (4-np-), the ligand anion (semi)chelated through the nitro pair of oxygen atoms, again with interleaving anion/ligand stacking.

Synthesis and structures of diaryloxystannylenes and -plumbylenes embedded in 1,3-diethers of thiacalix[4]arene

2020 ◽  
Vol 49 (35) ◽  
pp. 12234-12241
Author(s):  
Ryunosuke Kuriki ◽  
Takuya Kuwabara ◽  
Youichi Ishii
Keyword(s):  
Phenolic Oxygen ◽  
Oxygen Atoms

Monomeric stannylenes and plumbylenes embedded in 1,3-diethers of thiacalix[4]arene, whose structures are highly dependent on the substituents on the phenolic oxygen atoms, have been synthesized.

The Crystal and Molecular Structure of Bis-[μ-2-(p-nitrophenyliminomethyl)phenolato-N,O]-bis(ethanol)bis(nitrato-O,O')dinickel(II), [Ni(slno)NO3(C2H5OH)]2, a Binuclear Ferromagnetic Salicylaldimine Derivative of Nickel Nitrate

1979 ◽  
Vol 32 (2) ◽  
pp. 331 ◽  
Author(s):  
RJ Butcher ◽  
E Sinn
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Nickel Atom ◽  
Nickel Nitrate ◽  
Distorted Octahedral Geometry ◽  
Tetrahedral Geometry ◽  
Imine Group ◽  
Phenolic Oxygen ◽  
Distorted Octahedral ◽  
Oxygen Atoms

The crystal and molecular structure of the complex bis-[μ-2-(p-nitrophenyliminomethyl)phenolato- N,O]-bis(ethanol)bis(nitrato-O,O')dinickel(11) and its magnetic properties are reported. Crystal data: space group PI, Z 1, a 8.882(2), b 9.332(3), c 12.533(4) �, α 94.40(2),B 109.99(2), γ 111.61(2)�, U 883 �3, R 2.8%, Rw 3.3% for 2154 reflections. The compound is prepared from the reaction of bis(N-p-nitrophenylsalicylaldimine)nickel(II) with nickel nitrate in hot triethoxymethane, and on cooling the solution deposited pale green transparent crystals. The structure contains neutral dimeric units with bridging through the phenolic oxygen atoms and has distorted octahedral geometry about each crystallographically identical nickel atom. The six donor atoms are made up of two oxygen atoms from the bidentate nitrate, oxygen from ethanol, nitrogen from the imine group and two bridging phenolic oxygen atoms. The Ni2O2 group is strictly planar possessing a crystallographic centre of symmetry. The angles subtended at the bridging oxygen atoms indicate a tetrahedral geometry and it is demonstrated that this is important in explaining the ferromagnetic intradimer interaction. The presence of hydrogen bonding between the ethanol hydrogen and the nitrate group of an adjacent molecule appears to be an important stabilizing factor in determining the structure and provides a possible pathway for the antiferromagnetic interdimer exchange interaction.

The structure of ferroverdin II. Rhombohedral ferroverdin crystals

1973 ◽  
Vol 184 (1075) ◽  
pp. 137-148 ◽  
Keyword(s):  
Carbon Tetrachloride ◽  
Sodium Ion ◽  
Double Layers ◽  
Sodium Ions ◽  
Crystal Data ◽  
Asymmetric Unit ◽  
Data Space ◽  
Phenolic Oxygen ◽  
Disordered Carbon ◽  
Oxygen Atoms

Ferroverdin, a green iron containing natural product, crystallizes in rhombohedral crystals which have the following composition Crystal data: Space group R 3̄ c ; a = 16.06; c = 88.78; ρ calc = 1.446 for, as asymmetric unit, Fe/3.Na/3.C 15 H 10 NO 4 .CCl 4 .CH 3 OH, M , 480. R = 16% on Weissenberg photographic data, eye estimated intensities. The iron nitrosophenyl complexes are linked together by sodium ions in double layers; each sodium ion contacts three carboxy oxygen atoms and three methanol oxygen atoms and the methanoloxygen atoms are hydrogen bonded to the phenolic oxygen atoms. The layers are stacked to enclose large cavities in each of which are sited six, partly disordered, carbon tetrachloride molecules.

Synthesis of Monofunctionalized Calix[5]arenes

Synthesis ◽  
2017 ◽  
Vol 50 (03) ◽  
pp. 676-684 ◽  
Author(s):  
Arne Lützen ◽  
Björn Ingenfeld ◽  
Steffen Straub ◽  
Christopher Frömbgen
Keyword(s):  
Hydrogen Bonds ◽  
Functional Groups ◽  
Functional Group ◽  
Building Blocks ◽  
Cone Conformation ◽  
Oh Groups ◽  
Tert Butyl ◽  
Fragment Condensation ◽  
Molecular Architectures ◽  
Phenolic Oh Groups

Seven OH-free and O-permethylated monofunctionalized calix[5]arenes carrying either additional methyl or tert-butyl groups are prepared following fragment condensation protocols. This strategy proves to be superior to previous approaches. Calix[5]arenes with free OH groups all adopt a cone conformation stabilized by a seam of hydrogen bonds at the lower rim. Post-condensation modifications, i.e., methylation of phenolic OH groups or functional group interconversions can also be achieved. Bulky tert-butyl groups are also found to stabilize the cone conformations of O-methylated compounds. These compounds offer versatile functional groups that make these concave molecules interesting building blocks for the synthesis of more sophisticated molecular architectures.

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