Pyridine Adsorption and Acid/Base Complex Formation on Ultrathin Films of γ-Al2O3on NiAl(100)

2003 ◽  
Vol 107 (33) ◽  
pp. 8538-8546 ◽  
Author(s):  
Kathryn A. Layman ◽  
Michelle M. Ivey ◽  
John C. Hemminger
Keyword(s):  
Complex Formation ◽  
Ultrathin Films ◽  
Pyridine Adsorption ◽  
Acid Base ◽  
Base Complex

Direct observation of various reaction pathways of arylnitrenes in different crystal environments caused by acid–base complex formation

2010 ◽  
Vol 66 (6) ◽  
pp. 647-661 ◽  
Author(s):  
Takahiro Mitsumori ◽  
Akiko Sekine ◽  
Hidehiro Uekusa ◽  
Yuji Ohashi
Keyword(s):  
Complex Formation ◽  
Structural Changes ◽  
Uv Light ◽  
Reaction Pathway ◽  
Crystal Form ◽  
X Rays ◽  
Acid Base ◽  
Base Complex ◽  
X Ray ◽  
Complex Crystals

The structures of reaction intermediates, arylnitrenes and their final products have been successfully analyzed by X-rays using acid–base complex formation. The acid–base complexes of 2-azidobenzoic acid (2a), 3-azidobenzoic acid (3a) and 4-azidobenzoic acid (4a) were made with dibenzylamine (db), N-benzyl-2-phenylethylamine (bp) and dicyclohexylamine (dc). For the complex crystals of (3a) and db (3a-db), and (4a) and db (4a-db) two forms of (I) and (II) were obtained. Eight types of complex crystals, (2a-db), (3a-db-I), (3a-db-II), (3a-dc), (4a-db-I), (4a-db-II), (4a-bp) and (4a-dc), suitable for X-ray analysis were obtained. When the crystals were irradiated with UV light at low temperatures, the reactions proceeded keeping the single-crystal form in the five crystals (2a-db), (3a-db-I), (3a-db-II), (3a-dc) and (4a-bp). Less than 25% of each azidobenzoic acids was transformed into an arylnitrene and dinitrogen. In three crystals the arylnitrenes produced gave new final products; 2,1-benzisoxazolone was observed for (2a-db) and trans-azobenzenes (i.e. dimerized nitrenes) were obtained for (3a-db-II) and (4a-bp). For (3a-db-I) and (3a-dc) the intermediate arylnitrenes were observed but did not transform to new products. All the structural changes were directly observed by X-ray analysis because the incomplete reactions occurred with retention crystallinity. The crystal environment, including the hydrogen bonding between the benzoic acid and the amine, places restrictions on the movement of the arylnitrene and influences the reaction pathway followed for conversion of the arylnitrene to its final product.

Proton conducting membrane using multi-layer acid–base complex formation on porous PE film

2006 ◽  
Vol 284 (1-2) ◽  
pp. 155-160 ◽  
Author(s):  
M.S. Cho ◽  
H.D. Son ◽  
J.D. Nam ◽  
S.J. Suh ◽  
Y. Lee
Keyword(s):  
Complex Formation ◽  
Acid Base ◽  
Proton Conducting ◽  
Base Complex ◽  
Proton Conducting Membrane

scholarly journals Effect of intercalator and Lewis acid–base branched peptide complex formation: boosting affinity towards HIV-1 RRE RNA

MedChemComm ◽  
2016 ◽  
Vol 7 (7) ◽  
pp. 1436-1440 ◽  
Author(s):  
Jessica E. Wynn ◽  
Wenyu Zhang ◽  
Denis M. Tebit ◽  
Laurie R. Gray ◽  
Marie-Louise Hammarskjold ◽  
...  
Keyword(s):  
Complex Formation ◽  
Lewis Acid ◽  
Boronic Acid ◽  
Peptide Library ◽  
Acid Base ◽  
Peptide Complex ◽  
Hiv 1

Screening of a boronic acid and acridine containing branched peptide library revealed compounds that bind HIV-1 RRE RNA and inhibit HIV-1 replication.

Acid-base behaviour and complex formation

2010 ◽  
pp. 103-136 ◽  
Author(s):  
D. P. N. Satchell ◽  
R. S. Satchell
Keyword(s):  
Complex Formation ◽  
Acid Base

Toward novel sulphur-containing derivatives of tetraazacyclododecane: synthesis, acid–base properties, spectroscopic characterization, DFT calculations, and cadmium(ii) complex formation in aqueous solution

2020 ◽  
Vol 44 (20) ◽  
pp. 8337-8350 ◽  
Author(s):  
Marianna Tosato ◽  
Marco Verona ◽  
Riccardo Doro ◽  
Marco Dalla Tiezza ◽  
Laura Orian ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Dft Calculations ◽  
Spectroscopic Characterization ◽  
Acid Base ◽  
Derivatives Of ◽  
Base Properties

New sulphur derivatives of cyclen, with potential complementary properties with respect to known compounds, have been synthesized and studied.

Equilibrium Studies of Alkyltin(IV) Complexes with D-Glucosamine

1997 ◽  
Vol 62 (7) ◽  
pp. 1023-1028 ◽  
Author(s):  
Mohamed M. Shoukry ◽  
Samir M. El-Medani
Keyword(s):  
Complex Formation ◽  
Stability Constants ◽  
Acid Base ◽  
Complex Formation Equilibria ◽  
Equilibrium Studies ◽  
Formation Equilibria ◽  
Effects Of Temperature ◽  
The Stability

The acid-base and complex-formation equilibria involving glucosamine and its complexes with alkyltin(IV) chlorides have been studied by potentiometric technique. The results prove to a formation of 1 : 1 complex with trialkyltin(IV) and both 1 : 1 and 1 : 2 complexes with dialkyltin(IV) species. The stability constants in water were determined, the effects of temperature (from 15 to 35 °C) and ethanol (up to 88 vol.%) was studied and the speciation of the complexes was resolved.

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