Premium
A Spectrophotometric Investigation of the Interaction of Iodine with Dibenzyldiaza‐18‐crown‐6, Aza‐15‐crown‐5 and N‐phenylaza‐15‐crown‐5 in Chloroform Solution
Author(s) -
Shamsipur Mojtaba,
Pouretedal Hamid Reza
Publication year - 2004
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200400019
Subject(s) - chemistry , chloroform , triiodide , iodine , arrhenius equation , ligand (biochemistry) , 18 crown 6 , inorganic chemistry , ion , reaction rate constant , kinetic energy , complex formation , kinetics , organic chemistry , activation energy , electrode , biochemistry , dye sensitized solar cell , electrolyte , receptor , physics , quantum mechanics
The complex formation reactions between iodine and DBzDA18C6, A15C5 and N‐phenylA15C5 have been studied spectrophotometrically in chloroform solution. In the case of DBzDA18C6 is the resulting 1:2 (ligand…I + )I 3 − , while, in the case of A15C5 and N‐phenylA15C5 a 2:2 molecular complex of [(ligand) 2 …I + ]I 3 − type was formed. The spectrophotometric results indicate that gradual release of triiodide ion from its contact ion paired form in the molecular complex into the solution is the rate‐determining step of the reaction. The kinetic rate constants for the complexation reactions were determined at different temperatures, and activation parameters were calculated from Arrhenius and Eyring equations.