Crystal structures of N²,N³,N⁵,N⁶-tetra-kis-(pyridin-2-ylmeth-yl)pyrazine-2,3,5,6-tetra-carboxamide and N²,N³,N⁵,N⁶-tetra-kis-(pyridin-4-ylmeth-yl)pyrazine-2,3,5,6-tetra-carboxamide.

ABSTRACT: The title compounds, C₃₂H₂₈N₁₀O₄· unknown solvent, (I), and C₃₂H₂₈N₁₀O₄, (II), are pyrazine-2,3,5,6-tetra-carboxamide derivatives. In (I), the substituents are (pyridin-2-ylmeth-yl)carboxamide, while in (II), the substituents are (pyridin-4-ylmeth-yl)carboxamide. Both compounds crystallize in the monoclinic space group P2₁/n, with Z' = 1 for (I), and Z' = 0.5 for (II). The whole mol-ecule of (II) is generated by inversion symmetry, the pyrazine ring being situated about a center of inversion. In (I), the four pyridine rings are inclined to the pyrazine ring by 83.9 (2), 82.16 (18), 82.73 (19) and 17.65 (19)°. This last dihedral angle involves a pyridine ring that i

SUBMITTER: Cati DS 

PROVIDER: S-EPMC5290586 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature