2,4-Dibromo-3-methoxy-6-nitrobenzaldeyde: effect of substituents on ring geometry
作者:J. A. Paixão、A. Matos Beja、M. Ramos Silva、L. Alte da Veiga、A. C. Serra
DOI:10.1107/s0108270100012853
日期:2000.12.15
compound, C(8)H(5)Br(2)NO(4), the endocyclic angles of the ring deviate significantly from the ideal value of 120 degrees. The substituents deviate from the plane of the ring, with large twist angles for the aldehyde, nitro and methoxy groups. The geometry of the molecule in the crystal is compared with that of the isolated molecule, as given by a self-consistent field molecular-orbital Hartree-Fock calculation
在标题化合物C(8)H(5)Br(2)NO(4)中,环的环内角明显偏离理想的120度值。取代基偏离环的平面,对于醛,硝基和甲氧基具有大的扭转角。通过自洽场分子轨道Hartree-Fock计算得出的结果,将晶体中分子的几何形状与分离出的分子的几何形状进行比较。晶体结构中仅存在CH.Br和CH.O型弱氢键。