"Excess" electrons in LuGe.
Angew Chem Int Ed Engl
; 60(12): 6457-6461, 2021 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-33236821
ABSTRACT
The monogermanide LuGe is obtained via high-pressure high-temperature synthesis (5-15â
GPa, 1023-1423â
K). The crystal structure is solved from single-crystal X-ray diffraction data (structure type FeB, space group Pnma, a=7.660(2)â
Å, b=3.875(1)â
Å, and c=5.715(2)â
Å, RF =0.036 for 206 symmetry independent reflections). The analysis of chemical bonding applying quantum-chemical techniques in position space was performed. It revealed-beside the expected 2c-Ge-Ge bonds in the germanium polyanion-rather unexpected four-atomic bonds between lutetium atoms indicating the formation of a polycation by the excess electrons in the system Lu3+ (2b)Ge2- ×1 e- . Despite the reduced VEC of 3.5, lutetium monogermanide is following the extended 8-N rule with the trend to form lutetium-lutetium bonds utilizing the electrons left after satisfying the bonding needs in the anionic Ge-Ge zigzag chain.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Alemanha