Redox-responsive molybdenum mononitrosyl complexes incorporating cyclic polyether cation binding sites and x-ray crystal structure of [Mo(NO){HB(3,5-Me2C3N2H)3}{OCH2(CH2OCH2)3CH2O}]

1992 ◽  
Vol 31 (2) ◽  
pp. 263-267 ◽  
Author(s):  
Najat J. AlObaidi ◽  
Sithy S. Salam ◽  
Paul D. Beer ◽  
Christopher D. Bush ◽  
Thomas A. Hamor ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Binding Sites ◽  
Cation Binding ◽  
X Ray ◽  
Redox Responsive

Synthesis, X-ray crystal structure and cation binding properties of a tetrahomodioxacalix[4]arene tetraester

1991 ◽  
Vol 10 (3) ◽  
pp. 329-339 ◽  
Author(s):  
Fran�oise Arnaud-Neu ◽  
Suzanne Cremin ◽  
Des Cunningham ◽  
Stephen J. Harris ◽  
Patrick McArdle ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Cation Binding ◽  
Binding Properties ◽  
X Ray

Ring-Enlarged Dibenzo-Crown-6 Ethers. Cation Binding and X-Ray Crystal Structure of Dibenzo-22-Crown-6

1993 ◽  
Vol 66 (8) ◽  
pp. 2309-2314 ◽  
Author(s):  
Mikio Ouchi ◽  
Takashi Araki ◽  
Tadao Hakushi ◽  
M. Elizabeth Sobhia ◽  
Kizakkekoikkal K. Chacko ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Cation Binding ◽  
X Ray

Redox responsive metal complexes containing cation binding sites

1987 ◽  
Vol 5 (4) ◽  
pp. 521-524 ◽  
Author(s):  
Paul D. Beer ◽  
Christopher J. Jones ◽  
Jon A. McCleverty ◽  
Sithy S. Salam
Keyword(s):  
Metal Complexes ◽  
Binding Sites ◽  
Cation Binding ◽  
Redox Responsive

scholarly journals Self-association of an indole based guanidinium-carboxylate-zwitterion: formation of stable dimers in solution and the solid state

2010 ◽  
Vol 6 ◽  
Author(s):  
Carolin Rether ◽  
Wilhelm Sicking ◽  
Roland Boese ◽  
Carsten Schmuck
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Binding Sites ◽  
Ion Pairs ◽  
Ph Titration ◽  
X Ray ◽  
Ideal Orientation ◽  
Guanidinium Group ◽  
Self Association ◽  
Zwitterion Formation

The indole based zwitterion 2 forms stable dimers held together by H-bond assisted ion pairs. Dimerisation was confirmed in the solid state and studied in solution using dilution NMR experiments. Even though zwitterion 2 forms very stable dimers even in DMSO, their stability is lower than of an analogous pyrrole based zwitterion 1. As revealed by the X-ray crystal structure the two binding sites in 2 cannot be planar due to steric interactions between the guanidinium group and a neighbouring aromatic CH. Hence the guanidinium moiety is twisted out of planarity from the rest of the molecule forcing the two monomers in dimer 2·2 to interact in a non-ideal orientation. Furthermore, the acidity of the NHs is lower than in 1 (as determined by UV-pH-titration) also leading to less efficient binding interactions.

The synthesis and electrochemistry of novel redox responsive molybdenum complexes containing cyclic polyether cation binding sites

1986 ◽  
pp. 239 ◽  
Author(s):  
Najat Al Obaidi ◽  
Paul D. Beer ◽  
Joel P. Bright ◽  
Christopher J. Jones ◽  
Jon A. McCleverty ◽  
...  
Keyword(s):  
Binding Sites ◽  
Cation Binding ◽  
Molybdenum Complexes ◽  
Redox Responsive

Binding sites between palladium(II) and nucleosides or nucleotides and crystal structure of [Pd(diethylenetriamine)(guanosine)](ClO4)2

1980 ◽  
Vol 58 (4) ◽  
pp. 381-386 ◽  
Author(s):  
F. D. Rochon ◽  
P. C. Kong ◽  
B. Coulombe ◽  
R. Melanson
Keyword(s):  
Crystal Structure ◽  
Binding Sites ◽  
Palladium Atom ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
R Factor ◽  
Square Planar ◽  
Purine Ring ◽  
Coordination Plane

The interactions between [Pd(dien)Cl]Cl and some nucleosides and nucleotides were studied by nmr. The binding site of guanosine, guanosinemonophosphoric acid, xanthosine, and inosine is N(7). Cytidine is coordinated to palladium through N(3). Adenosinemonophosphate acts as a bidentate, binding two different palladium atoms at N(1) and N(7).The crystal structure of [Pd(dien)(guanosine)](ClO4)2 has been determined by X-ray diffraction. The crystals are orthorhombic, space group P212121, with a = 13.422, b = 14.587, c = 12.432, and Z = 4. The structure was refined by block-diagonal least-squares analysis to a conventional R factor of 0.047 and a weighted Rw = 0.043. The coordination around the palladium atom is square planar. Guanosine is bonded to palladium through N(7). The planar purine ring makes an angle of 63.4° with the palladium coordination plane. The structure is stabilized by hydrogen bonding.

Supramolecular Complex Formed by Fumaric Acid and Piperazine: Crystal Structure, and Synthon Cooperation

2015 ◽  
Vol 1120-1121 ◽  
pp. 168-173
Author(s):  
Shi Ying Wang ◽  
Pei Qi Xing ◽  
Xiu Juan Geng ◽  
Rui Xin Chen
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
Fumaric Acid ◽  
Binding Sites ◽  
Supramolecular Complex ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrogen Bond Interactions ◽  
Supramolecular Chains ◽  
Thermal Stability Of

A new molecular complex constructed by fumaric acid with piperazine has been prepared and characterized by single crystal X-ray diffraction. The number of fumaric acid involved in the complex equals to the number of N-protonated binding sites in the piperazine molecule. The structure contained infinite 1D supramolecular chains held together by robust, primary O–H•••O charge-assisted hydrogen bonds, and the 2D sheet like pattern constructed via the expected carboxyl-piperazine heterosynthon. Persistent N–H•••O interactions were found to play an important role in the formation of the final 3D arrays. The five dominant supramolecular synthons in the crystal structure are the heteromeric carboxylic acid•••piperazine hydrogen bond interactions, which prevail in the presence of widely differing chemical functionalities. Thermal stability of the compound has been investigated by thermogravimetric analysis (TGA) of mass loss.

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