ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The reaction of a Mannich base type-polyamine polymer with iodine (I2) was studied kinetically and thermodynamically in order to clarify the polymer effects in the formation of triiodide ions (I3-). N,N-Dimethyl-p-(4-methylpiperazinomethyl) aniline and 1,4-dimethylpiperazine were used as low molecular weight donor model compounds. Triiodide ions are produced from the polyamine-I2 system immediately after mixing the two-component solutions, while in the systems with I2 and N,N-dimethyl-p-(4-methyl-piperazinomethyl)aniline and 1,4-dimethylpiperazine they are obtained only when relatively high concentrations of both donor and acceptor solutions were mixed. This is explained by the entropic contributions of the polymer chain such as the stacking effect of donor nitrogen atoms, i.e., the increment of local donor concentration around I2 in the reaction field. The relation between the solution behavior of the reaction systems and the rate of formation of I3- ions also supports this kind of polymer effect. The effects of neighboring groups and dielectric constant on the reaction are also discussed.
Additional Material:
13 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1974.170120115
