Effect of High-Pressure on the Infrared-Spectra of the Thiamine Enzyme Active Aldehyde Intermediate 2-(Alpha-Hydroxybenzyl)Thiamine Chloride (Hbt) and the Mercury(Ii) Complex, Hg(Hbt)Cl3 (Journal article)

Butler, I. S./ Kawai, N. T./ Huang, Y./ Louloudi, M./ Hadjiliadis, N.


The effects of high external pressures (approximately 30 kbar) on the IR spectra of the protonated form of 2-(alpha-hydroxybenzyl)thiamine chloride (HBT.HCI) and the zwitterionic mercury(II) complex Hg(HBT) Cl3 have been investigated at room temperature. With the exception of the nu(OH) peak of the HBT ligand, all the observed peaks shift towards higher wavenumbers with increasing pressure. The most pressure-sensitive peaks (d-nu/dP > 0.6 cm-1/kbar) are chiefly associated with vibrations of the pyrimidine ring. The S conformation of the pyrimidine and thiazolium rings is apparently retained under high pressure in both HBT and Hg(HBT)Cl3, as is also the case in solution.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
Keywords: crystal-structure,raman-spectra,micro-raman,spectroscopy
URI: http://olympias.lib.uoi.gr/jspui/handle/123456789/10499
ISSN: 0020-1693
Link: <Go to ISI>://A1992JL78200016
http://ac.els-cdn.com/S0020169300829680/1-s2.0-S0020169300829680-main.pdf?_tid=97bd5872-362e-11e3-9399-00000aab0f26&acdnat=1381906129_596c585e9772fddcd17c31f3ade3c949
Publisher: Elsevier
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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