High-pressure Fourier transform micro-Raman spectroscopic investigation of diiodine-heterocyclic thioamide adducts (Journal article)

dos Santos, J. H. Z./ Butler, I. S./ Daga, V./ Hadjikakou, S./ Hadjiliadis, N.

The pressure dependences of the Fourier transform micro-Raman spectra of four heterocyclic thioamides [{(bztzdtH)I-2} . I-2] (1) (bztzdtH = benzothiazole-2-thione), [(bztzdtH)I-2] (2), [{(tzdtH)(2)I+} . I-3(-) . 2I(2)] (3) (tzdtH = thia- zoline-2-thione), and [{bzimtH)I-2}(2) . I-2 . 2H(2)O] (4) (bzimtH = benzimidazole-2-thione) have been studied between ambient pressure and 50 kbar. For 1, generation of I-3(-) ions through disproportionation reactions is evident as the pressure is increased. There are empirical linear correlations between the frequency and (I-I) bond length and the applied pressure. The iodine adduct of thioamide 2 is more sensitive to pressure when compared to the 1 or 4 iodine adducts. This difference in behavior may be attributed to differences in crystal structures or to a lower I-I bond order. Monitoring of other vibrational transitions of the thiomide structure reveals several less important pressure dependences. (C) 2002 Elsevier Science B.V. All rights reserved.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
Keywords: diamond-anvil cell, high pressure,vibrational spectroscopy,ft-raman, thioamide,charge-transfer,molecular-structure,iodine,polyiodides,mechanism,crystal,complex,spectra
URI: https://olympias.lib.uoi.gr/jspui/handle/123456789/8109
ISSN: 1386-1425
Link: <Go to ISI>://000178161200021
http://ac.els-cdn.com/S1386142502000288/1-s2.0-S1386142502000288-main.pdf?_tid=76717b1f6337398da9dcabde160d6c80&acdnat=1333030115_8b64a4728b16d58902852feb538f455f
Publisher: Pergamon-Elsevier
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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