Spherical aromaticity and electron delocalization in $${\text{C}}_8$$ C 8 and $${\text{B}}_4{\text{N}}_4$$ B 4 N 4 cubic systems
| Autor: | Thierry Leininger, Véronique Brumas, Buse Chaglayan, Nadia Ben Amor, Stefano Evangelisti, Ahmad W. Huran |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Electron mobility 010304 chemical physics Ab initio Electronic structure Electron Spherical aromaticity 010402 general chemistry Total position spread 01 natural sciences 0104 chemical sciences Crystallography Coupled cluster 0103 physical sciences Physical and Theoretical Chemistry Wave function |
| Zdroj: | Theoretical Chemistry Accounts. 138 |
| ISSN: | 1432-2234 1432-881X |
| DOI: | 10.1007/s00214-018-2387-9 |
| Popis: | The electronic structure of the two isoelectronic species $${\text{C}}_8$$ and $${\text{B}}_4{\text{N}}_4$$ has been studied at several ab initio levels (Hartree–Fock, CASSCF, CASPT2, and coupled cluster). For both systems, the total position spread tensor and the electron entropy have been computed and compared. These quantities are indicators that give insight into the electron mobility (and, in the case of the spread, the behavior of different-spin electrons), and are a measure of the multi-reference character of an electronic wavefunction. Our results indicate that the two systems are deeply different. In fact, the $${\text{C}}_8$$ cluster shows a pronounced multi-reference character. The $${\text{B}}_4{\text{N}}_4$$ system, on the other hand, is very well described by a single reference wave function. Analysis of ground-state electronic structure unveils different electron delocalization behavior in the studied systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink