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Interactions of thiamine monophosphate (TMP) with one- and two-dimensional polymeric halogenomercurate anions. Crystal structures of (TMP)(Hg2Br5)·0.5H2O and (TMP)2(Hg3I8)
- Source :
-
Inorganica Chimica Acta . May2002, Vol. 333 Issue 1, p63. 9p. - Publication Year :
- 2002
-
Abstract
- An investigation into the interactions between thiamine monophosphate (TMP) and anions has resulted in the preparation and X-ray characterization of the compounds (TMP)(Hg2Br5)·0.5H2O (1) and (TMP)2(Hg3I8) (2). In each compound the TMP molecule exists as a monovalent cation in the usual F conformation. The halogenomercurate anions occur in two-dimensional (2-D) network in 1 or one-dimensional (1-D) chain in 2. In both 1 and 2, the structures consist of alternating cationic sheets of the hydrogen-bonded TMP molecules and anionic sheets of the polymeric halogenomercurate anions. The TMP molecule binds to the polymeric anions through the characteristic ‘anion bridge I’, C(2)&z.sbnd;H<f>⋯</f>X<f>⋯</f>pyrimidinium (X=Br in 1 and I in 2), and electrostatic interactions between electropositive S(1) and halogen atoms. The ‘anion bridge II’ of the type N(4′1)&z.sbnd;H<f>⋯</f>X<f>⋯</f>thiazolium (X=phosphate group) plays a role in stabilizing the molecular conformation. The biological implication of the host–guest-like complexation between TMP and polymeric anions is discussed. [Copyright &y& Elsevier]
- Subjects :
- *ORGANOMERCURY compounds
*ORGANOHALOGEN compounds
*X-ray crystallography
Subjects
Details
- Language :
- English
- ISSN :
- 00201693
- Volume :
- 333
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Inorganica Chimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 7800123
- Full Text :
- https://doi.org/10.1016/S0020-1693(02)00757-0