1. Synthesis and Characterization of a Metallacyclic Framework with Three Fused Five-membered Rings.
- Author
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Zhu, Congqing, Wu, Jingjing, Li, Shenyan, Yang, Yuhui, Zhu, Jun, Lu, Xin, and Xia, Haiping
- Subjects
- *
METALLACYCLES , *RING formation (Chemistry) , *CHEMICAL synthesis , *METAL-organic frameworks , *X-ray diffraction - Abstract
Polycyclic complexes containing a bridgehead transition metal are interesting species because the transition metal is shared by all the rings simultaneously. In this study, we present a novel osmium-bridgehead system with three fused five-membered rings. This novel framework can be viewed as a 10-atom carbon chain coordinating to the osmium center. In sharp contrast to the nonplanar organic analogue, this unique metallacycle exhibits good planarity, which was unambiguously verified by means of X-ray diffraction. Interestingly, preliminary DFT calculations show that the aromaticity in the three 5MRs of these osmatricycles can be easily tuned by the ligand substitution. Finally, the broad UV/Vis absorption spectra of these novel polycyclic complexes were also reported. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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