Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Studies on the Crystal Structure of Benzidine Perchlorate by X-ray Diffraction Method (I) Relation between the Space Group and the Composition of the Diamine Salt Crystal

X-線 廻折法을 利用한 벤지딘過鹽素酸鹽의 結晶構造에 關한 硏究 (I) 空間群과 Diamine 鹽 結晶의 組成과 關係

  • Koo, Chung-Hoe (Department of Chemistry, College of Liberal Arts and Sciences, Seoul National University) ;
  • Sa Kong, Yul (Department of Chemistry, College of Liberal Arts and Sciences, Hanyang Univesity) ;
  • Kang, Man-Hyong (Department of Chemistry, College of Liberal Arts and Sciences, Hanyang Univesity) ;
  • Shin, Hyun-So (Research Institute of Mining and Metallurgy)
  • 구정회 (서울大學校 文理科大學 化學科) ;
  • 사공열 (漢陽大學校 文理科大學 化學科) ;
  • 강만형 (漢陽大學校 文理科大學 化學科) ;
  • 신현소 (金屬${\cdot}$燃料 綜合硏究所)
  • Published : 19700300
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Abstract

In those six kinds of diamine salt crystal of which their structures had already been determined up to date, commonly one molecule of diamine and two molecules of acid were combined; although the crystal of benzidine perchlorate, only one molecule each of benzidine and perchloric acid were combined. At the case of benzidine perchlorate, one molecule acts as the role of two molecules by coincidence of the center of symmetry point of both the lattice and molecule, and perchlorate ion is locating symmetrically between two -$NH_2$ groups of different benzidine molecule, therefore benzidine and acid could be combined together with 1:1 by mole ratio. When forming the salt with diamine and acid, the combining mole ratio would be determined in accordance with the relationship between the symmetry element that presented by the space group and the symmetry element of diamine salt melecule.

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References

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