Spectroscopic Studies on the Reaction of Iodine with the Mixed Oxygen-nitrogen Cyclic Base 4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8,8,8]hexacosane

Abstract

The interaction of the mixed oxygen-nitrogen cyclic base, 4,7,13,16,21,24-hexaoxa-1,10- diazabicyclo[8,8,8] hexacosane (HODABCHC) with iodine as a s-acceptor has been studied spectrophotometrically at room temperature in CHCl₃. The spectra indicate the formation of the triiodide ion, I₃^– and the complex was formulated as [(HODABCHC)I]⁺.I₃^– in good agreement with elemental analysis, photometric titration plots based on the characteristic absorption bands of I₃^– ion around 292 and 360 nm and infrared measurements. Far infrared spectrum shows the characteristic bands for I₃^–ion at 154, 105 and 56 cm^-1 are assigned for the V_s(I-I), V_s(I-I) and d(I₃^–), respectively.