| Isolation and Crystal Structure of Trans-2,2',4,4'-tetramethyl-6,6'-dinitro Azobenzene |
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| 作者姓名： | WANG Xiao-Linga b② YANG Bo-Luna LI Zong-Xiaob YUAN Chun-Lanb YU Kai-Beic a |
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| 作者单位： | WANG Xiao-Linga，b② YANG Bo-Luna LI Zong-Xiaob YUAN Chun-Lanb YU Kai-Beic a (Environmental and Chemical Engineering Institute，Xian Jiaotong University，Xi抋n 710049，China) b (Department of Chemistry and Chemical Engineering，Baoji College of Arts and Sciences，Baoji 721007，China) c (Chengdu Institute of Organic Chemistry，The Chinese Academy of Sciences，Chengdu 610041，China) |
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| 基金项目： | This work was supported by the Natural Science Foundation of Shaanxi Province (No. 01JK080 and 02JS40) |
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| 摘 要： | 1 INTRODUCTION The aconitum plants produce various diterpene and norditerpene alkaloids1, 2]. Up to now more than 450 diterpenoid and norditerpenoid alkaloids have been isolated from the roots of this genus3]. Sub- sequent studies on the flower of the same subspecies were directed to the other secondary metabolites such as flavonoids4, 5]. The flavonoidic composi- tions of several oriental species of A. plants have been reported6～8]. A. sungpanense hand. Mazz., a very highly poi- s…
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Isolation and Crystal Structure of Trans-2,2',4,4'-tetramethyl-6,6'-dinitro Azobenzene |
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| Abstract: | Trans-2,2?,4,4?-tetramethyl-6,6?-dinitro azobenzene (C16H16N4O4, Mr = 328.32) was isolated from benzene extract of the leaves of Aconitum sungpanense Hand. Mazz. as a new compound, and characterized by spectral methods and X-ray diffraction analysis. It crystallizes in monoclinic system, space group P21/c with a = 8.544(1), b = 13.997(2), c = 7.161(1) ? ?= 112.97(1), V = 788.4(2) ?, Z = 4, Dc = 1.383 g/cm3, F(000) = 344 and ?MoKa) = 0.102 mm-1. The final R = 0.0395 and wR = 0.1140 for 1913 independent reflections with Rint = 0.0109 and 1329 observed reflections with I > 2s(I). The molecule is composed of two phenyl rings through trans N=N. |
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| Keywords: | trans-2 2? 4 4?-tetramethyl-6 6?-dinitro azobenzene aconitum sungpanense Hand Mazz spectral methods X-ray diffraction analysis |
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