Synthesis, structure and reactivity of samarium complexes supported by Schiff-base ligands |
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| Authors: | Bangyu Li Yaorong Wang Qi Shen |
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| Affiliation: | a Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Suzhou University, Suzhou 215123, PR China
b Suzhou Vocational University, Suzhou 215104, PR China |
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| Abstract: | Three tris(salicyladiminato) samarium complexes  were synthesized by the reaction of anhydrous SmCl3 with the sodium salts of the Schiff-bases in THF in 3:1 molar ratio. X-ray diffraction studies revealed that the coordination geometry around samarium atom could be best described as a distorted pentagonal bipyramidal for complexes 1 and 2 and as a distorted tricapped trigonal prism for complex 3. It was found that the coordination environment around samarium atom has significant effect on the catalytic activity of homoleptic Schiff-base complexes of lanthanide. The increasing order of the catalytic activity for the ring-opening polymerization of ε-caprolactone, as well as guanylation of aniline with N,N-diisopropylcarbodiimide is 3 < 2 < 1. |
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| Keywords: | Samarium Schiff-base Crystal structure ε boldFont" >-Caprolactone Polymerization Guanylation |
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