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Synthesis and Characterization of a Metallacyclic Framework with Three Fused Five‐membered Rings
Author(s) -
Zhu Congqing,
Wu Jingjing,
Li Shenyan,
Yang Yuhui,
Zhu Jun,
Lu Xin,
Xia Haiping
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704057
Subject(s) - metallacycle , osmium , planarity testing , aromaticity , ligand (biochemistry) , chemistry , characterization (materials science) , crystallography , ring (chemistry) , transition metal , stereochemistry , diffraction , x ray crystallography , molecule , materials science , nanotechnology , physics , organic chemistry , biochemistry , receptor , ruthenium , optics , catalysis
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.