Abstract
The asymmetric unit of the title compound, C19H17N3O3, consists of two independent molecules that are disposed about a pseudo-centre of inversion. The plane of the phenyl substituent is twisted by 38.1 (1)° [43.6 (1)° in the second molecule] out of the plane of the quinoxaline ring system. The five-membered ring of the substituent at the 2-position adopts an envelope conformation; the 5-CH2 atom representing the flap lies out of the plane defined by the other four atoms [deviation 0.264 (7) Å in the first molecule and 0.291 (6) Å in the second]. The dihedral angle between the five-membered ring and the 4-phenyl ring is 84.9 (1)° while that between the five-membered ring and the 5-phenyl ring is 65.6 (1)°.
Highlights
The asymmetric unit of the title compound, C19H17N3O3, consists of two independent molecules that are disposed about a pseudo-centre of inversion
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BT5521)
Refinement H atoms were placed in calculated positions (C—H 0.95–0.99 Å) and were included in the refinement in the riding model approximation, with U(H) set to 1.2Ueq(C); 4149 Friedel pairs were merged
Summary
The asymmetric unit of the title compound, C19H17N3O3, consists of two independent molecules that are disposed about a pseudo-centre of inversion. The plane of the phenyl substituent is twisted by 38.1 (1) [43.6 (1) in the second molecule] out of the plane of the quinoxaline ring system. The five-membered ring of the substituent at the 2-position adopts an envelope conformation; the 5-CH2 atom representing the flap lies out of the plane defined by the other four atoms [deviation 0.264 (7) Ain the first molecule and 0.291 (6) Ain the second].
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