Crystal structures of 2,3-bis-(thio-phen-2-yl)pyrido[2,3-b]pyrazine and 7-bromo-2,3-bis-(thio-phen-2-yl)pyrido[2,3-b]pyrazine.

ABSTRACT: The crystal structures of 2,3-bis-(thio-phen-2-yl)pyrido[2,3-b]pyrazine, C₁₅H₉N₃S₂ (1), and 7-bromo-2,3-bis-(thio-phen-2-yl)pyrido[2,3-b]pyrazine, C₁₅H₈BrN₃S₂ (2), are discussed. Both mol-ecules crystallize in space group P2₁/c. In 1, the thienyl rings are inclined to the mean plane of the pyrido-pyrazine moiety by 6.16 (7) and 86.66 (8)°, where as in 2 the corresponding dihedral angles are 33.29 (11) and 19.84 (9)°. The pyrido-pyrazine moiety is relatively planar in 1 with the two rings being inclined to each other by 1.33 (7)°. In 2, however, the pyrido-pyrazine moiety is buckled with the corresponding dihedral angle bein

SUBMITTER: Popek R 

PROVIDER: S-EPMC6323875 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature