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Structural-chemical transformations during organic self-propagating high-temperature synthesis. Crystal structure of piperazine malonate and its crystal hydrate

  • Physical Chemistry
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Russian Chemical Bulletin Aims and scope

Abstract

An organic salt, piperazine malonate, was prepared by self-propagating high-temperature synthesis (SHS) in a solid-phase piperazine-malonic acid (P-M) system. Triclinic crystals of piperazine malonate (PM) hydrate (I) were isolated from an aqueous solution. Monoclinic crystals of anhydrous piperazine malonate (2) were isolated from a solution in DMSO. Crystals 1 and 2 were studied by X-ray structural analysis. Structures 1 and 2 consist of centrosymmetrical piperazinium cations, which are linked to anions of malonic acid through N−N…O hydrogen bonds. In structure 1, the anion is asymmetrical. The angle between the planes of the carboxyl groups and the plane of the CH2 groups are 29. 2° and 99.9°. In structure 2, the anion is located on a twofold axis, and the corresponding angles are 81.5°. The N…O distances are in the range of 2.691(4)–2.838(5) Å.

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Authors and Affiliations

  1. Institute of Structural Macrokinetics, Russian Academy of Sciences, 142432 Chernogolovka, Mascow Region, Russian Federation

    V. I. Ponomarev, E. G. Klimchuk, A. G. Merzhanov & O. S. Filipenko

Authors
  1. V. I. Ponomarev
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  2. E. G. Klimchuk
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  3. A. G. Merzhanov
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  4. O. S. Filipenko
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Additional information

Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 979–983, May, 1997.

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Ponomarev, V.I., Klimchuk, E.G., Merzhanov, A.G. et al. Structural-chemical transformations during organic self-propagating high-temperature synthesis. Crystal structure of piperazine malonate and its crystal hydrate. Russ Chem Bull 46, 939–943 (1997). https://doi.org/10.1007/BF02496123

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  • DOI: https://doi.org/10.1007/BF02496123

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