Trinuclear magnesium complexes stabilized by aminoalkoxide ligands |
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Authors: | Hyo-Suk Kim Sheby Mary George Eun Ae Jung Jeong Hwan Han Bo Keun Park Seung Uk Son |
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Affiliation: | 1. Thin Film Materials Research Center, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea;2. Department of Chemistry, Sungkyunkwan University, Suwon, Republic of Korea |
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Abstract: | New magnesium complexes, [Et2Mg3(dmamp)4] (1) and [(CH2=CH)2Mg3(dmamp)4] (2), were prepared by the reaction of alkylmagnesium bromide with sodium 1-dimethylamino-2-methyl-2-propoxide [Na(dmamp)] in THF. Complexes 1 and 2 were characterized by 1H and 13C NMR spectroscopies, FTIR spectroscopy, elemental analysis, and single-crystal X-ray diffraction (XRD) analysis. The XRD analysis showed that these complexes are trinuclear where the alkoxy O is the μ2-O bridge between the Mg ions. Among the three metal centers, the two terminal Mg ions are five coordinate and have a square–pyramidal geometry, whereas the central Mg is four coordinate with a distorted tetrahedral geometry. The combination of ethyl and vinyl groups with sterically bulky aminoalkoxide ligands plays an important role in stabilizing the molecule. |
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Keywords: | Magnesium complexes grignard reagent aminoalkoxide trinuclear crystal structure |
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