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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 7, Number 4
August 20, 1963 

The Crystal Structure of Ethylenediamine Dihydrochloride ClH·H2N·CH2·CH2·NH2·HCl

Ethylenediamine 염산염의 결정구조
Chung Hoe Koo, Moon Il Kim, Chung Soo Yoo

구정회, 김문일, 유정수
The crystal structure of ethylenediamine dihydrochloride has been determined by the methods and refined by two-dimensional Fourier syntheses. The unit cell dimensions are a = 4.44±0.02, b = 6.88±0.02, c = 9.97±0.02 Å, β = 92±1°. The space group is P21/c. The carbon and nitrogen atoms in the ethylenediamine itself lie on one and its structure has a trans-form with a centre of symmetry in it, and C-C distance of 1.54 Å, C-N distance of 1.48Å and C-C-N bond angle of 109.07°. The molecules are linked by N-H…Cl hydrogen bonds with distance of 3.14, 3.16 and 3.22 Å forming three dimensional network. The values of reliability factor for F(okl), F(hol) and F(hko) are 0.11, 0.10 and 0.09 respectively.
293 - 298
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