[1,4]Ditellurino[2,3-b:5,6-b']di-pyrazine.

ABSTRACT: [1,4]Ditellurino[2,3-b:5,6-b']di-pyrazine represents the first reported [1,4]chalcogena[2,3-b:5,6-b']di-pyrazine containing a heavy chalcogens The asymmetric unit consists of three mol-ecules. In contrast to its sulfur analog, which is planar [Lynch et al. (1994 ▸) Cryst. Struct. Commun. 50,1470-1472], C₈H₄N₄Te₂ is folded along the Te⋯Te axis to accommodate the larger chalcogenide atoms. The dihedral angle between the two Te₂C₂ 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 inter-molecular Te⋯N contacts, with distances i

SUBMITTER: Franklin D 

PROVIDER: S-EPMC9462040 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature