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 Vs(I-I), Vs(I-I) and d(I3–), respectively.