Abstract
In the title molecule, C24H20N2, the pyrazine ring is significantly distorted from planarity, presumably due to steric crowding, and its conformation is well described as a flattened twist-boat. The benzene ring adjacent to the ethyl group forms dihedral angles of 53.79 (13) and 85.47 (12)° with the other benzene rings; the dihedral angle between adjacent benzene rings is 57.90 (12)°. The ethyl group is disordered over two positions; the site-occupancy factor of the major component is 0.546 (4). No hydrogen bonds are found in the crystal structure.
Highlights
C24H20N2, the pyrazine ring is significantly distorted from planarity, presumably due to steric crowding, and its conformation is well described as a flattened twist-boat
The ethyl group is disordered over two positions; the site-occupancy factor of the major component is 0.546 (4)
No hydrogen bonds are found in the crystal structure
Summary
Key indicators: single-crystal X-ray study; T = 123 K; mean (C–C) = 0.004 A; disorder in main residue; R factor = 0.063; wR factor = 0.198; data-to-parameter ratio = 14.7. C24H20N2, the pyrazine ring is significantly distorted from planarity, presumably due to steric crowding, and its conformation is well described as a flattened twist-boat. The benzene ring adjacent to the ethyl group forms dihedral angles of 53.79 (13) and 85.47 (12) with the other benzene rings; the dihedral angle between adjacent benzene rings is 57.90 (12). The ethyl group is disordered over two positions; the site-occupancy factor of the major component is 0.546 (4). No hydrogen bonds are found in the crystal structure
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