Spectroscopic studies of complexes of iodine with the bases 1-aza-15-crown-5 and 3,6,9,14-tetrathiabicyclo[9.2.1]tetradeca-11,13-diene.
The interactions of iodine with each of the electron donors 1-aza-15-crown-5 (AC) and 3,6,9,14-tetrathiabicyclo[9.2.1]tetradeca-11,13-diene (TTBCTD) in CHCl3 have been described in terms of 1:1 and 1:2, base: I2 complexes, respectively, forming the complexes of the type [(AC)2I]+.I3- and [(TTBCTD)(I2)2]. The [(AC)2I]+.I3- shows the characteristic absorptions of I3- ion at 265 and 365 nm while the charge-transfer transition of [(TTBCTD)(I2)2] occurs at 320 nm. The formation of the two complexes was further confirmed by far infrared measurements. The values of the complex formation constant, K, and the absorpativity, in CHCl3 are calculated for the complex [(AC)2I]+.I3-.
Hassan
Kh A
KhA
Department of Chemistry, Faculty of Science, Qatar University, Doha 2713. khqab@qu.edu.qa
D001372:Aza Compounds / Q000737:chemistry*; D004583:Electrons; D006574:Heterocyclic Compounds, 2-Ring / Q000737:chemistry*; D007455:Iodine / Q000737:chemistry*; D015394:Molecular Structure; D010783:Photometry; D013057:Spectrum Analysis; D017186:Titrimetry
D001372:Aza Compounds; D006574:Heterocyclic Compounds, 2-Ring; D007455:Iodine; C498097:3,6,9,14-tetrathiabicyclo(9.2.1)tetradeca-11,13-diene