Spectroscopic studies of the reaction of iodine with 2,3-diaminopyridine

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Nessreen A Al-Hashimi

Abstract

The charge-transfer interaction of 2,3-diaminopyridine (DAPY) and iodine has been investigated spectrophotometrically in the solvents chloroform and dichloromethane at room temperature. The results indicate the formation of 1:2 charge-transfer complex in each solvent with the observation of the two characteristic absorptions for triiodide ion around 355 and 295 nm. The iodine complex is formulated as [(DAPY)I]+.I3-. The formation of the triiodide ion, I3-, is further confirmed by the observation of the characteristic bands for non-linear I3- ion with C2v symmetry at 151 and 132 cm(-1) assigned to nu(as)(I-I) and nu(s)(I-I) of the I-I bonds and at 61 cm(-1) due to bending delta(I3-). The mid infrared spectra of (DAPY) and triiodide complex are also obtained and assigned.

Citations

Jan 27, 2016·Chemical Reviews·Gabriella CavalloGiancarlo Terraneo
Nov 26, 2010·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·M PandeeswaranK P Elango
Mar 17, 2010·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·M Pandeeswaran, K P Elango

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