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Stereochemistry and solid-state circular dichroism spectroscopy of eight-coordinate chiral lanthanide complexes

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Abstract

Eight-coordinate chiral lanthanide complexes [Eu(dbm)3LRR] (1), [Eu(dbm)3LSS] (2) and [Tb(dbm)3LRR] (3) (LRR/LSS = (-)-/(+)-4,5-pineno-2,2′-bipyridine, Hdbm = dibenzoylmethane) were synthesized stereoselectively, which were characterized by UV-vis, CD spectra and X-ray single-crystal diffraction. The mirror-image structure features of complexes 1 and 2 were obtained by combination of the solid-state CD spectra and the crystal structure analysis. After further comparison with the solid-state CD spectra of six-coordinate and seven-coordinate metal complexes containing β-diketone ligands, the CD spectra-absolute configuration correlation rule for the eight-coordinate β-diketonate lanthanide complexes was proposed through the exciton chirality method for the first time. The Δ or Λ absolute configurations of complexes 1–3 with the distorted square antiprism geometry were confirmed by the X-ray single-crystal analysis.

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Authors and Affiliations

  1. State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China

    Nan Zhou, ShiGang Wan, Jian Zhao, YiJi Lin, WeiMin Xuan, XueMing Fang & Hui Zhang

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  1. Nan Zhou
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  2. ShiGang Wan
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  3. Jian Zhao
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  4. YiJi Lin
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  5. WeiMin Xuan
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  7. Hui Zhang
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Correspondence to Hui Zhang.

Additional information

Supported by the National Natural Science Foundation of China (Grant Nos. 20773098 & 20973136) and the Innovation Foundation of Xiamen University (Series 2) (Grant No. XDKJCX20061027)

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Zhou, N., Wan, S., Zhao, J. et al. Stereochemistry and solid-state circular dichroism spectroscopy of eight-coordinate chiral lanthanide complexes. Sci. China Ser. B-Chem. 52, 1851–1857 (2009). https://doi.org/10.1007/s11426-009-0261-2

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  • DOI: https://doi.org/10.1007/s11426-009-0261-2

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