Metal complexes in acetic acid. 10. Variable-pressure oxygen-17 NMR studies on acetic acid exchange of manganese(II) perchlorate and manganese(II) acetate

1988 ◽  
Vol 27 (18) ◽  
pp. 3192-3195 ◽  
Author(s):  
Masao Ishii ◽  
Shigenobu Funahashi ◽  
Motoharu Tanaka
Keyword(s):  
Acetic Acid ◽  
Metal Complexes ◽  
Variable Pressure ◽  
Nmr Studies ◽  
Pressure Oxygen ◽  
Acid Exchange

scholarly journals Metallkomplexe in Anorganischen Matrices, 5 [1] / Metal Complexes in Inorganic Matrices, 5 [1]

1991 ◽  
Vol 46 (6) ◽  
pp. 783-788 ◽  
Author(s):  
Christian Egger ◽  
Ulrich Schubert
Keyword(s):  
Acetic Acid ◽  
Metal Complexes ◽  
Phenylacetic Acid ◽  
Sol Gel ◽  
Rhodium Complex ◽  
Gel Processing ◽  
Inorganic Matrices

A heterogenized rhodium complex, prepared by sol-gel processing of Rh(CO)Cl[PPh2CH2CH2Si(OEt)3]2 and Si(OEt)4, is shown to catalyze the conversion of the silanes H4-nSiPh„ (n = 1 - 3) or (HMe2Si)2O to (poly)siloxanes by air or water. Using THF as a solvent, the silanoles Ph3SiOH or Ph2Si(OH)2 are obtained instead. The reaction of phenylacetic acid or acetic acid with HSiPh3 to give silyl esters is catalyzed by the same compound.

Group I metal complexes of a new series of macrobicyclic ligands : X-ray and NMR studies

1991 ◽  
Vol 43 (2-3) ◽  
pp. 392
Author(s):  
V. Mckee ◽  
M. Dorrity ◽  
J. Malone ◽  
D. Marrs ◽  
J. Nelson
Keyword(s):  
Metal Complexes ◽  
Nmr Studies ◽  
X Ray ◽  
Group I

scholarly journals Dimerization of Acetic Acid in the Gas Phase—NMR Experiments and Quantum-Chemical Calculations

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2150 ◽  
Author(s):  
Ondřej Socha ◽  
Martin Dračínský
Keyword(s):  
Acetic Acid ◽  
Gas Phase ◽  
Low Temperatures ◽  
Variable Temperature ◽  
Glass Tube ◽  
Variable Pressure ◽  
Liquid Phases ◽  
Donor And Acceptor ◽  
Moller Plesset ◽  
Triple Excitation

Due to the nature of the carboxylic group, acetic acid can serve as both a donor and acceptor of a hydrogen bond. Gaseous acetic acid is known to form cyclic dimers with two strong hydrogen bonds. However, trimeric and various oligomeric structures have also been hypothesized to exist in both the gas and liquid phases of acetic acid. In this work, a combination of gas-phase NMR experiments and advanced computational approaches were employed in order to validate the basic dimerization model of gaseous acetic acid. The gas-phase experiments performed in a glass tube revealed interactions of acetic acid with the glass surface. On the other hand, variable-temperature and variable-pressure NMR parameters obtained for acetic acid in a polymer insert provided thermodynamic parameters that were in excellent agreement with the MP2 (the second order Møller–Plesset perturbation theory) and CCSD(T) (coupled cluster with single, double and perturbative triple excitation) calculations based on the basic dimerization model. A slight disparity between the theoretical dimerization model and the experimental data was revealed only at low temperatures. This observation might indicate the presence of other, entropically disfavored, supramolecular structures at low temperatures.

scholarly journals Metal complexes of theophylline-7-acetic acid. Crystal structure of a nickel(II) compound containing non-coordinated theophylline-7-acetate ion

Polyhedron ◽  
1995 ◽  
Vol 14 (5) ◽  
pp. 611-616 ◽  
Author(s):  
Juan M. Salas ◽  
Miguel Quirós ◽  
M.Angustias Romero ◽  
M.Purificación Sánchez ◽  
Miguel A. Salas ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Metal Complexes ◽  
Acid Crystal
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