Transition‐Metal Chemistry of Alkaline‐Earth Elements: The Trisbenzene Complexes M(Bz) 3 (M=Sr, Ba)
| Autor: | Sudip Pan, Mingfei Zhou, Qian Wang, Jian‐Hong Bian, Guohai Deng, Guanjun Wang, Gernot Frenking, Yan-Bo Wu, Lili Zhao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Benzene Complexes
Alkaline earth metal Strontium 010405 organic chemistry Chemistry alkaline earth metals chemistry.chemical_element General Medicine General Chemistry Electronic structure 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences bonding analysis Crystallography Transition metal Chemical bond 18-electron rule Singlet state Ground state Valence electron Research Articles Research Article matrix isolation spectroscopy |
| Zdroj: | Angewandte Chemie (International Ed. in English) |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.201908572 |
| Popis: | We report the synthesis and spectroscopic identification of the trisbenzene complexes of strontium and barium M(Bz)3 (M=Sr, Ba) in low‐temperature Ne matrix. Both complexes are characterized by a D 3 symmetric structure involving three equivalent η6‐bound benzene ligands and a closed‐shell singlet electronic ground state. The analysis of the electronic structure shows that the complexes exhibit metal–ligand bonds that are typical for transition metal compounds. The chemical bonds can be explained in terms of weak donation from the π MOs of benzene ligands into the vacant (n−1)d AOs of M and strong backdonation from the occupied (n−1)d AO of M into vacant π* MOs of benzene ligands. The metals in these 20‐electron complexes have 18 effective valence electrons, and, thus, fulfill the 18‐electron rule if only the metal–ligand bonding electrons are counted. The results suggest that the heavier alkaline earth atoms exhibit the full bonding scenario of transition metals. Bonding scenarios: The synthesis and spectroscopic identification of the trisbenzene complexes of strontium and barium M(Bz)3 (M=Sr, Ba) in a low‐temperature Ne matrix is reported. The complexes exhibit metal–ligand bonds that are typical for transition‐metal compounds. The results suggest that the heavier alkaline‐earth atoms exhibit the full bonding scenario of transition metals. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text