Crystal structures of (E)-1-(3,4,5-trimethoxyphenyl)-2-nitroethene and (E)-1-(3,4,5-trimethoxyphenyl)-2-nitropropene

Abstract

The crystal and molecular structures of (E)-1-(3,4,5-trimethoxyphenyl)-2-nitroethene (1), C11H13NO5, Mr = 239.2, and (E)-1-(3,4,5-trimethoxyphenyl)-2-nitropropene (2), C12H15NO5, Mr = 253.3, were determined by X-ray diffraction. Compound 1: monoclinic, space group P21/c, a = 7.429(2), b = 9.828(3), c = 32.766(2) Å, β = 95.65(2)°, V = 2381 (1) Å3, Z = 8. Compound 2: monoclinic, space group P21/c, a = 8.888(3), b = 13.650(3), c = 10.369(3) Å, β = 94.04(2)°, V = 1255(1) Å3, Z = 4. Compound 1 exhibits no unusual structural features. Compound 2 shows a side chain out of the ring plane and with expanded valence angles.