Abstract
The butoxy- and methoxy-derivatives (HLc, and HLb, respectively) of 1-[(ethoxycarbonyl)methyl]-3-hydroxy-2-(1H)-pyridinone, HLa, were synthesized by transesterification and the mononuclear complexes [MoO2(La-c)(2)] were obtained by the reaction of the ligands with molybdenyl acetylacetonate. The three complexes were fully characterized by H-1 and C-13 NMR spectroscopy, mass spectrometry and elemental analyses. A variable temperature NMR study showed that the N-substituents do not have a significant influence on the racemisation process of the complexes. The comparison of the crystal structure of [MoO2(L-b)(2)] with [MoO2(L-a)(2)] confirmed that an additional methylene group does not affect the immediate coordination environment of the molybdenum centre. The methoxy-derivative HLb was also found to produce a dinuclear complex of composition [{MoO2(L-b)O}(2)], the structure of which was determined by X-ray diffraction.
Original language | English |
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Pages (from-to) | 2458-2462 |
Number of pages | 5 |
Journal | Dalton Transactions |
Issue number | 16 |
DOIs | |
Publication status | Published - 2004 |
Keywords
- IRON(III)-CHELATING PROPERTIES
- DIOXOMOLYBDENUM(VI) COMPLEXES
- HYDROXYPYRIDINONES
- CRYSTAL
- MOLYBDENUM(VI)
- SIDEROPHORE
- IRON(III)
- LIGANDS
- AGENTS
- DESIGN