Equilibria involving allylbenzene, chloride ion, and palladium(II) in acetic acid solution

1972 ◽  
Vol 25 (5) ◽  
pp. 919 ◽  
Author(s):  
BI Cruikshank ◽  
NR Davies
Keyword(s):  
Absorption Spectrum ◽  
Acetic Acid ◽  
Complex Formation ◽  
Acid Solution ◽  
Acetic Acid Solution ◽  
Chloride Ion ◽  
Catalytic Isomerization

The addition of allylbenzene to sodium di-μ-chloro-tetrachlorodipalladate(11) in acetic acid solution produces changes in the absorption spectrum which are compared with those produced by chloride ion and by pyridine. The occurrence and disappearance of certain isosbestic points over various ranges of ligand to palladium ratios together with evidence from plots of absorbance against mole ratio indicates that complex formation occurs in discrete steps. Evidence is presented which supports the view that under the conditions normally employed for the homogeneous catalytic isomerization of alkenes, the palladium is present as a monomeric palladium-alkene complex.

scholarly journals Zeta Potential and Turbidimetry Analyzes for the Evaluation of Chitosan/Phytic Acid Complex Formation

2014 ◽  
Vol 3 (2) ◽  
pp. 71 ◽  
Author(s):  
Noura Saïed ◽  
Mohammed Aider
Keyword(s):  
Acetic Acid ◽  
Complex Formation ◽  
Zeta Potential ◽  
Acid Solution ◽  
Surface Charge ◽  
Phytic Acid ◽  
Acetic Acid Solution ◽  
Deionized Water ◽  
Acid Complex ◽  
Ph Range

<p>The aim of this work was to study the possible complex formation between chitosan and phytic acid. Zeta potential and turbidity measurements were used as a basis to confirm the possible complex between these two molecules. The obtained results showed that chitosan at a concentration of 0.1% (w/v) were soluble in 0.1% acetic acid solution. This concentration of the acetic acid was the lowest that allows chitosan to dissolve. A positive surface charge of chitosan was recorded in the pH interval from 1 to 7. The highest zeta potential values were obtained at pH &lt; 5 and decreased significantly at pH 6 and 7. Regarding phytic acid, it was soluble in deionized water and acetic acid whatever the concentration of the acetic acid and in the entire pH range 2-10. Phytic acid had negative surface charge in deionized water and in 0.1% acetic acid, but was slightly positively charged in 5% acetic acid solution. The solubility of chitosan was decreased by the presence of phytic acid. The formation of chitosan/phytic acid complex as monitored by measuring the zeta potential does not allow us to conclude that the formation of this complex is possible.</p>

Some Approaches to Viscometric Study of Chitosan in Acetic Acid Solution

2016 ◽  
Vol 10 (2) ◽  
pp. 135-139 ◽  
Author(s):  
Valentina Chernova ◽  
◽  
Angela Shurshina ◽  
Elena Kulish ◽  
Gennady Zaikov ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Intrinsic Viscosity ◽  
Acetic Acid Solution ◽  
Conformational State ◽  
Macromolecular Coil ◽  
Degree Of Swelling ◽  
Current Value ◽  
Viscometric Study

Some ways of estimating the values of the intrinsic viscosity of chitosan were analyzed. It was shown that the method of Irzhak and Baranov for estimating the current value of the intrinsic viscosity allows to adequately estimates the conformational state of the macromolecular coil and its degree of swelling.

Compatibility studies of chitosan/PVA blend in 2% aqueous acetic acid solution at 30°C

2010 ◽  
Vol 82 (2) ◽  
pp. 251-255 ◽  
Author(s):  
H.M.P. Naveen Kumar ◽  
M.N. Prabhakar ◽  
C. Venkata Prasad ◽  
K. Madhusudhan Rao ◽  
T.V. Ashok Kumar Reddy ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Acetic Acid Solution ◽  
Aqueous Acetic Acid ◽  
Compatibility Studies ◽  
Aqueous Acetic Acid Solution

The Action of Platinum on Cholesterol in Acetic Acid Solution

1944 ◽  
Vol 66 (10) ◽  
pp. 1752-1755 ◽  
Author(s):  
Herbert S. Anker ◽  
Konrad Bloch
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Acetic Acid Solution
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