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https://olympias.lib.uoi.gr/jspui/handle/123456789/9205Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Louloudi, M. | en |
| dc.contributor.author | Hadjiliadis, N. | en |
| dc.contributor.author | Butler, I. S. | en |
| dc.date.accessioned | 2015-11-24T16:47:34Z | - |
| dc.date.available | 2015-11-24T16:47:34Z | - |
| dc.identifier.issn | 0300-9246 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/9205 | - |
| dc.rights | Default Licence | - |
| dc.subject | nuclear-magnetic-resonance | en |
| dc.subject | molecular-structure | en |
| dc.subject | crystal-structure | en |
| dc.subject | c-13 nmr | en |
| dc.subject | chloride hydrochloride | en |
| dc.subject | stereochemistry | en |
| dc.subject | mercury(ii) | en |
| dc.subject | vitamin-b1 | en |
| dc.subject | catalysis | en |
| dc.title | Solution Versus Solid-State Conformation of Group-12 Metal-Complexes of Active Aldehyde Derivatives of Thiamine | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.identifier.primary | Doi 10.1039/Dt9920001401 | - |
| heal.identifier.secondary | <Go to ISI>://A1992HQ62000011 | - |
| heal.identifier.secondary | http://pubs.rsc.org/en/Content/ArticleLanding/1992/DT/dt9920001401 | - |
| heal.language | en | - |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.publicationDate | 1992 | - |
| heal.abstract | Molar conductances in water and dimethylformamide and C-13 NMR spectra in D2O and (CD3)2SO solutions and solid-state C-13 cross polarization magic angle spinning NMR spectra have been measured for the chloride salts of 2-(alpha-hydroxybenzyl)thiamine (hbt), 2-(alpha-hydroxycyclohexylmethyl)-thiamine (hcmt), their protonated forms [hbt]Cl.HCl and [hcmt]Cl.HCl and zwitterionic complexes of the type [M(hbt)Cl3] and [M(hcmt)Cl3] (M = Zn, Cd or Hg). The data affords good evidence for bonding of the metals to the N(1') atom of the pyrimidine moieties in the ligands, as well as of the S conformation of the ligands in solution. The small chemical shifts observed for the carbon atoms situated adjacent to the N(1') site [C(2'), C(6') and 2'-CH3] in the solid-state and solution C-13 NMR spectra of the complexes are attributed to the synergic interaction of metal complexation which causes a downfield shift and the accumulation of negative charge at the same position due to [MCl3]- which leads to an opposing upfield shift. The Hg-199 NMR spectra of [Hg(hbt)Cl3] and [Hg(hcmt)Cl3] in (CD3)2SO further substantiate these conclusions. Overall, the results strongly support earlier suggestions for the role of metal ions in the enzymatic action of thiamine. | en |
| heal.journalName | Journal of the Chemical Society-Dalton Transactions | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΧΗΜ | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Louloudi-1992-Solution Versus Solid-State.pdf | 390.45 kB | Adobe PDF | View/Open Request a copy |
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