Structure of 2-(1-phenylimidiazolidin-2-ylidene)- malononitrile and 2-(hexahydropyrimidinyl-2-ylidene)- malononitrile |
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| Authors: | Yin-Xiang Lu Hui Zhou Peng Guo Lan Jin Wei Xu |
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| Institution: | (1) Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China;(2) Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China |
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| Abstract: | The crystal structure of 2-(1-phenylimidazolidin-2-ylidene)-malononitrile, I, and 2-(hexahydropyrimidin-2-ylidene)-malononitrile, II, were determined with crystal data (I: Monoclinic, P21/n, a=8.116(3) ?, b=7.650(3) ?, c=17.399(7) ?, β=93.065(6)°, R
all=0.0980; II: Monoclinic, P21/n, a=9.169(2) ?, b=8.103(2) ?, c=10.337(3) ?, β=99.853(4)°, R
all=0.0877). N−H···N hydrogen bonds were responsible for the formation of centrosymmetric dimers of I and one-dimensional zigzag molecular chains of II. |
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| Keywords: | ylidenemalononitriles molecular assemblies centrosymmetric dimers X-ray diffraction |
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