[1,4]Ditellurino[2,3-b:5,6-b′]di­pyrazine

[1,4]Ditellurino[2,3-b:5,6-b′]di­pyrazine represents the first reported [1,4]chalcogena[2,3-b:5,6-b′]di­pyrazine containing a heavy chalcogens The asymmetric unit consists of three mol­ecules. In contrast to its sulfur analog, which is planar [Lynch et al. (1994 ▸) Cryst. Struct. Commun. 50,1470–147...

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Detalles Bibliográficos
Autores principales: Franklin, Donna, Lee, Aundrea, Fronczek, Frank R., Junk, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2022
Materias:
Data Reports
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9462040/
https://www.ncbi.nlm.nih.gov/pubmed/36339891
http://dx.doi.org/10.1107/S2414314622006228
Descripción
Sumario:[1,4]Ditellurino[2,3-b:5,6-b′]di­pyrazine represents the first reported [1,4]chalcogena[2,3-b:5,6-b′]di­pyrazine containing a heavy chalcogens The asymmetric unit consists of three mol­ecules. In contrast to its sulfur analog, which is planar [Lynch et al. (1994 ▸) Cryst. Struct. Commun. 50,1470–1472], C(8)H(4)N(4)Te(2) is folded along the Te⋯Te axis to accommodate the larger chalcogenide atoms. The dihedral angle between the two Te(2)C(2) rings of the central ring is 57.9° (mean of three). C—Te bond lengths range from 2.1105 (16) Å to 2.1381 (17) Å, in good agreement with those predicted by their covalent radii. All Te atoms are involved in inter­molecular Te⋯N contacts, with distances in the range 2.894 (2) to 2.963 (2) Å. These result in a spiral supra­molecular assembly, forming helical columns. [Image: see text]

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