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  • CO…HC interactions as packing motifs in the crystals: Part 4. Intermolecular interactions in the structures of N-[(4-arylpiperazin-1-yl)-alkyl]2-azaspiro[4.4]nonane and [4.5]decane-1,3-dione derivatives
  • Add time:09/28/2019         Source:infona.pl

    In continuation of the studies on weak H-bond formation in N-substituted-spiro-succinimides, the crystal structures of three derivatives from the series of N-methyl-arylpiperazine-spiro-succinimides were examined. Previously and newly studied species differ in the lengths of the distance between imide and aromatic rings. In the described structures methyl-piperazine is located as an aliphatic linker in the place of one atomic group (CH 2 ). It was established that the distance elongation destroyed supramolecular synthons formed in previously studied N-benzyl-spiro-succinimides. The molecules of N-methyl-arylpiperazine-spiro-succinimides are joined predominantly in dimmers via two types of weak H-bonds: CO…HC(sp 3 ) and CO…HC(arom). In the bonds with Csp 3 piperazine carbon atoms are mainly involved.

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    Prev:Dzhemilev reaction for the synthesis of spiro[3.3]heptane and spiro[3.4]octanes
    Next: Synthesis, physicochemical and anticonvulsant properties of new N-phenylamino derivatives of 2-azaspiro[4.4]nonane- and [4.5]decane-1,3-diones: Part V)

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