Complex formation between sulfur dioxide and halide ions in acetonitrile solution

1971 ◽  
Vol 10 (3) ◽  
pp. 614-619 ◽  
Author(s):  
Thomas H. Norris ◽  
E. J. Woodhouse
Keyword(s):  
Sulfur Dioxide ◽  
Complex Formation ◽  
Acetonitrile Solution ◽  
Halide Ions

Complex formation between sulfur dioxide and halide ions

1977 ◽  
Vol 55 (15) ◽  
pp. 2807-2812 ◽  
Author(s):  
Etela Milanova ◽  
Robert L. Benoit
Keyword(s):  
Sulfur Dioxide ◽  
Complex Formation ◽  
Enthalpy Of Solution ◽  
Halide Ions ◽  
Iodide Ions ◽  
Enthalpy Changes ◽  
Stability Order ◽  
The Difference ◽  
The Stability ◽  
Dipolar Aprotic Solvents

Complex formation between sulfur dioxide and iodide ions in acetonitrile (AN) has been studied by vapour pressure measurements. The enthalpy changes ΔH0 for 1:1 association reactions between SO2 and halide (X−) ions in AN and between SO2 and Cl− in dimethylsulfoxide (DMSO) have been determined at 25 °C by calorimetry. The ΔH0 values (kcal mol−1) are respectively −4.1 (Cl−), −3.4 (Br−), −3.0 (I−) in AN and −0.7 (Cl−) in DMSO. In contrast to previous literature data there is a linear relationship between these ΔH0 and reported ΔG0 values for the formation of the SO2X− complexes in AN. The difference between the ΔH0 values for SO2Cl− in the solvents AN and DMSO is accounted for by the more exothermic enthalpy of solution of SO2 in DMSO which is the more basic solvent, and by the expected minor difference in the enthalpies of transfer of Cl− and SO2Cl− from AN to DMSO, both dipolar aprotic solvents. Some of the problems connected with the stability order of the SO2X− complexes are discussed in relation to solvent effects and properties of X−.

Electrochemical Bifunctionalization of Olefins in the Presence of Halide Ions

1971 ◽  
Vol 49 (5) ◽  
pp. 740-745 ◽  
Author(s):  
N. L. Weinberg ◽  
A. Kentaro Hoffman
Keyword(s):  
Anodic Oxidation ◽  
Acetonitrile Solution ◽  
Halide Ions ◽  
Silver Salts ◽  
Chemical Oxidants

An electrochemical procedure has been developed for halofunctionalization of olefins, which allows for introduction of both nitrogen and oxygen containing substituents. The method obviates the need for silver salts or chemical oxidants, presently employed in analogous chemical routes. Thus 1-phenyl-2-butene on electrolysis in acetonitrile solution containing Et4NI, Et4NBr, or Et4NCl was converted to the corresponding haloamide derivative. In a related study, which extends the scope of electrochemical functionalization by nitrogen to negatively substituted olefins, dimorpholinization of trans-dibenzoylethylene was carried out by anodic oxidation of an acetonitrile solution of the olefin in presence of morpholine and Et4NI.

Interaction of sulfur dioxide with heteropolyanions in nonpolar solvents. Evidence for complex formation

1987 ◽  
Vol 26 (1) ◽  
pp. 215-216 ◽  
Author(s):  
Dimitris E. Katsoulis ◽  
Valerie S. Tausch ◽  
Michael T. Pope
Keyword(s):  
Sulfur Dioxide ◽  
Complex Formation ◽  
Nonpolar Solvents
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