Inglebert S Antony, Kamalraja Jayabal, Sethusankar K, Perumal Paramasivam T
Sri Ram Engineering College, Chennai 602 024, India.
Organic Chemistry Division, CSIR-Central Leather Research Institute, Chennai 600 020, India.
Acta Crystallogr Sect E Struct Rep Online. 2014 Aug 1;70(Pt 9):o901-2. doi: 10.1107/S160053681401589X. eCollection 2014 Sep 1.
In the title compound, C19H22N2O5, the six-membered carbocyclic ring of the chromene moiety adopts an envelope conformation with the dimethyl-substituted C atom as the flap. The pyran ring has a flat-boat conformation. The meth-oxy-phenyl ring is orthogonal to the mean plane of the chromene moiety, with a dihedral angle of 89.97 (8)°. The amine N atom deviates from the chromene mean plane by 0.1897 (16) Å. The methyl-amine and the nitro group are involved in an intra-molecular N-H⋯O hydrogen bond which generates an S(6) ring motif. They are slightly twisted out of the plane of the chromene moiety with torsion angles of C-N-C-O(pyran) = 2.2 (3)° and O(nitro)-N-C-C = -5.6 (2)°. In the crystal, there are only C-H⋯π inter-actions present, forming inversion-related dimers.
在标题化合物C₁₉H₂₂N₂O₅中，色烯部分的六元碳环以二甲基取代的C原子为瓣采取信封构象。吡喃环具有平船构象。甲氧基苯基环与色烯部分的平均平面正交，二面角为89.97（8）°。胺N原子偏离色烯平均平面0.1897（16）Å。甲胺和硝基参与分子内N-H⋯O氢键，形成S（6）环 motif。它们与色烯部分的平面略有扭曲，扭转角C-N-C-O（吡喃） = 2.2（3）°和O（硝基）-N-C-C = -5.6（2）°。在晶体中，仅存在C-H⋯π相互作用，形成反演相关的二聚体。
