Spectrophotometric and Electrochemical Study of the Complexation of Iodine with 1,10-Diaza-18-Crown-6 in Acetonitrile Solution

Semnani, Abolfazl; Shareghi, Behzad; Sovizi, Mohammad Reza

doi:10.30492/ijcce.2000.10005

Spectrophotometric and Electrochemical Study of the Complexation of Iodine with 1,10-Diaza-18-Crown-6 in Acetonitrile Solution

Document Type : Research Article

Authors

¹ Department of Chemistry, Faculty of Science, Shahrekord University, Shahrekord, I.R. IRAN

² Department of Chemistry, Faculty of Science, Malek-e-Ashtar University of Technology, Shahinshahr, I.R. IRAN

10.30492/ijcce.2000.10005

Abstract

The complexation reaction between iodine and 1,10-Diaza-18-Crown-6 (DA18C6) has been studied in acetonitrile by spectrophotometric, biamperometric and conductometric techniques. The results are indicative of the formation of [(CH₃CH)_nI⁺.I¯₃] from iodine and acetonitrile, and the formation of DA18C_{6 I}⁺. I¯ from DA18C6 and [(CH₃CH)_nI⁺.I¯₃]. The formation constant of the latter reaction has been calculated from the absorbance-mole ratio data, using the nonlinear least square program "KINFIT". The IR spectra of acetonitrile-acetonitrile iodine complex and DA18C6-DA18C6 iodine complex arecompared and the effect of complexation on absorption bands are discussed.

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