Al-Dies Al-Anood M, Al-Omar Mohamed A, Amr Abd El-Galil E, El-Agrody Ahmed M, Ng Seik Weng, Tiekink Edward R T
Chemistry Department, Faculty of Science, King Khalid University, Abha 61413, PO Box 9004, Saudi Arabia.
Acta Crystallogr Sect E Struct Rep Online. 2013 Mar 2;69(Pt 4):o482-3. doi: 10.1107/S1600536813005503. Print 2013 Apr 1.
In the title compound, C24H20FN3O2, despite the 4H-pyran ring having a flattened half-chair conformation [the methine C atom lies 0.257 (3) Å above the plane of the remaining atoms with an r.m.s. deviation of 0.0295 Å], the 14 non-H atoms of the 4H-benzo[h]chromene residue are approximately coplanar (r.m.s. deviation = 0.081 Å). The benzene ring is nearly perpendicular to this plane [dihedral angle = 76.18 (10)°], but the planar (r.m.s. deviation = 0.033 Å) dimethyl-methanimidamide substituent is coplanar [dihedral angle = 1.96 (12)°]. In the crystal, centrosymmetric dimeric aggregates arise from C-H⋯N inter-actions, and these are connected into supra-molecular layers in the ab plane by C-H⋯π and π-π [inter-centroid (central C6 ring)⋯(outer C6 ring)(i) distance = 3.8564 (14) Å] inter-actions.
在标题化合物C₂₄H₂₀FN₃O₂中，尽管4H-吡喃环具有扁平的半椅构象[次甲基C原子位于其余原子平面上方0.257 (3) Å，均方根偏差为0.0295 Å]，但4H-苯并[h]色烯残基的14个非H原子近似共面（均方根偏差 = 0.081 Å）。苯环几乎垂直于该平面[二面角 = 76.18 (10)°]，但平面的（均方根偏差 = 0.033 Å）二甲基甲亚胺酰胺取代基是共面的[二面角 = 1.96 (12)°]。在晶体中，中心对称的二聚体聚集体通过C-H⋯N相互作用形成，并且这些通过C-H⋯π和π-π相互作用（质心间（中心C6环）⋯（外部C6环）(i)距离 = 3.8564 (14) Å）在ab平面中连接成超分子层。
