Synthesis and Crystal Structure of trans-2-(2,4,6-Trimethylphenyl)-1-Nitroethylene
作者:Pei-Hua Zhao、Mei Zhang、Gui-Zhe Zhao
DOI:10.14233/ajchem.2013.14513
日期:——
A nitroalkene compound, trans-2-(2,4,6-trimethylphenyl)-1-nitroethylene [C11H13NO2 (I)] has been synthesized and structurally characterized by elemental analysis, 1H (13C) NMR spectra and single-crystal X-ray diffraction. Compound (I) crystallizes in the triclinic, space group P-1 with a = 9.700(5), b = 13.784(7), c = 15.306(8) Å, a = 80.976(15), b = 84.85(2), g = 86.523(19)º, V = 2010.8(18) Å3, Z = 4, C22H26N2O4, Mr = 382.45, Dc = 1.263 g/cm3, F(000) = 816, μ (MoKa) = 0.087 mm-1, the final R1 = 0.0714 and wR2 = 0.1685 for 4737 observed reflections [I > 2s(I)]. In addition, X-ray analysis reveals that both the C-H···O short contacts and the p-p stacking interactions are observed in the crystal structure. The two kinds of intermolecular interactions extend the molecules into an infinite three-dimensional network.
合成了一种硝基烯烃化合物反式-2-(2,4,6-三甲基苯)-1-硝基乙烯[C11H13NO2(I)],并通过元素分析、1H(13C) NMR谱和单晶X射线衍射对其进行了结构表征.化合物(I)结晶于三斜晶系,空间群P-1,晶胞参数为a = 9.700(5) Å,b =13.784(7) Å,c = 15.306(8) Å,α = 80.976(15)º,β = 84.85(2)º,γ = 86.523(19)º,V = 2010.8(18) Å 3,Z = 4,C22H26N2O4,Mr = 382.45,Dc = 1.263 g/cm 3,F(000) = 816,μ (MoKα) = 0.087 mm-1,对4737个独立可观测衍射点[I > 2σ(I)]最终的R1值和wR2值分别为0.0714和0.1685.此外,X射线分析结果显示,C-H…O短程接触作用和π-π堆积作用均出现在该化合物的晶体结构中.这两类分子间相互作用将分子延伸成一个扩展的三维网络.