Resumo

CONCEICAO SILVA, ANTONIO J.G. et al. CRYSTAL STRUCTURES OF (E)-1-(3,4,5-TRIMETHOXYPHENYL)-2-NITROETHENE AND (E)-1-(3,4,5-TRIMETHOXYPHENYL)-2-NITROPROPENE. Bol. Soc. Chil. Quím. [online]. 1999, vol.44, n.4, pp.413-422. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16441999000400003.

The crystal and molecular structures of (E)-1-(3,4,5-trimethoxyphenyl)-2-nitroethene (1), C₁₁H₁₃NO₅, M_r = 239.2, and (E)-1-(3,4,5-trimethoxyphenyl)-2-nitropropene (2), C₁₂H₁₅NO₅, M_r = 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, b = 95.65(2)°, V = 2381(1) ų, Z = 8. Compound 2: monoclinic, space group P2₁/c, a = 8.888(3), b = 13.650(3), c = 10.369(3) Å, b = 94.04(2)°, V = 1255(1) ų, 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

Palavras-chave : X-ray crystallography; substituted nitrostyrenes; conformation.