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2,2'-(Piperazine-1,4-di-yl)diacetonitrile.

ABSTRACT: The complete mol-ecule of the title compound, C(8)H(12)N(4), is generated by a crystallographic inversion centre. The piperazine ring adopts a chair conformation with the N-bonded substituents in equatorial positions. In the crystal, mol-ecules are linked by C-H?N(c) (c = cyanide) hydrogen bonds.

SUBMITTER: Gao W

PROVIDER: S-EPMC3379374 | biostudies-other | 2012 Jun

REPOSITORIES: biostudies-other

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2,2'-(Piperazine-1,4-di-yl)diacetonitrile.

Gao Wei W Yang Jing J Wang Xin-Ling XL Zhou Ning N Wu Xue-Fen XF

Acta crystallographica. Section E, Structure reports online 20120519 Pt 6

The complete mol-ecule of the title compound, C(8)H(12)N(4), is generated by a crystallographic inversion centre. The piperazine ring adopts a chair conformation with the N-bonded substituents in equatorial positions. In the crystal, mol-ecules are linked by C-H⋯N(c) (c = cyanide) hydrogen bonds. ...[more]

PMID: 22719572

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2,2'-(Piperazine-1,4-di-yl)diethanaminium dibenzoate.

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| S-EPMC3414313 | biostudies-literature

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Project description:The asymmetric unit of the crystal contains one-fourth of the title compound, C(10)H(22)N(2)O(2), with the centre of the piperazine ring located at a site of 2/m symmetry. The piperazine ring adopts a chair conformation. The methine and methylene C atoms of the 2-hydroxypropyl groups show symmetry-imposed disorder over two equally occupied and mutually exclusive sets of positions. Only intra-molecular O-H?N contacts are observed.

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Project description:During the recrystallization of 3-[4-(2-carb-oxy-eth-yl)piperazin-1-yl]propionic acid, the carb-oxy-lic acid H atoms were transferred to the piperazine N atoms, forming the title compound, C(10)H(18)N(2)O(4)·2H(2)O, in which the zwitterion lies about an inversion center. In the crystal, bifurcated N-H?(O,O) hydrogen bonds connect the zwitterions into a two-dimensional framework parallel to (-102) forming R(4) (4)(30) rings. O-H?O hydrogen bonds involving the solvent water mol-ecules connect the two-dimensional framework into a three-dimensional network. In addition, weak C-H?O hydrogen bonds are observed.

| S-EPMC3470189 | biostudies-other

Poly[[di-aqua-[?-1,4-bis(pyridin-4-ylmeth-yl)piperazine-?(2) N:N']{?-2,2'-[(1,4-phenyl-ene)bis(-oxy)]di-acetato-?(2) O:O'}cobalt(II)] penta-hydrate].

Project description:In the title compound, {[Co(C10H8O6)(C16H20N4)(H2O)2]·5H2O} n , octa-hedrally coordinated Co(II) ions on crystallographic inversion centres are bound by trans O atoms belonging to two hydro-quinone-O,O'-di-acetate (hqda) anions {systematic name: 2,2'-[(1,4-phenyl-ene)bis-(-oxy)]di-acetate}, two trans-pyridine N-donor atoms from two bis-(pyridin-4-ylmeth-yl)piperazine (4-bpmp) ligands, and two trans aqua ligands. The exobidentate hqda and 4-bpmp ligands form [Co(hqda)(4-bpmp)(H2O)2] n coordination polymer layers parallel to (110) that are anchored into the full crystal structure by O-H?O hydrogen bonding between aqua ligands and ligated hqda O atoms. Disordered water mol-ecules of crystallization occupy incipient channels along [100]. However, these could not modeled reliably and so they were treated with SQUEEZE in PLATON [Spek (2009 ?). Acta Cryst. D65, 148-155]; the crystal data take the presence of these mol-ecules into account. The crystal under investigation was twinned by non-merohedry, the twin fraction of the components being 53.3% and 46.7%. Only data from the major twin component were used in the refinement.

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catena-Poly[[[tetra-aqua-magnesium]-trans-?-[(piperazine-1,4-diium-1,4-di-yl)bis-(methyl-ene)]di-phospho-nato] hemihydrate].

Project description:The structure of the title polymer, }[Mg(C6H14N2O6P2)(H2O)4]·0.5H2O} n , is based on centrosymmetric MgO6 octahedra, which are linked by [(piperazine-1,4-diium-1,4-di-yl)bis-(methyl-ene)]di-phospho-nate ligands, forming chains parallel to [1-1-1]. These chains are connected via hydrogen bonds primarily formed between the phospho-nate groups and water mol-ecules. The latter constitute four of the corners of the MgO6 polyhedra and bind to the O atoms of the phospho-nate groups of neighbouring chains. The lattice water molecule is disordered around an inversion centre, exhibiting an occupancy of 0.25.

| S-EPMC3793689 | biostudies-literature

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Bis[3,3'-(piperazine-1,4-di-yl)-dipropan-aminium] di-?(2)-sulfido-bis-[disulfido-german-ate(IV)].

Project description:In the title compound, (C(10)H(26)N(4))(2)[Ge(2)S(6)], the dimeric [Ge(2)S(6)](4-) anion formed by two edge-sharing GeS(4) tetra-hedral units lies around an inversion centre. The average terminal and bridging Ge-S bond lengths are 2.162?(7) and 2.267?(15)?Å, respectively. The inorganic anions and organic cations are organized into a three-dimensional network by numerous N-H?S hydrogen bonds.

| S-EPMC3414115 | biostudies-literature

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Project description:In the title salt, (C12H20N2)[CuCl4], the Cu(II) atom occupies a general position in a flattened tetra-hedral environment by Cl ligands, characterized by Cl-Cu-Cl angles of 134.04?(3) and 137.18?(4)°. The six-membered piperazinediium ring adopts a chair conformation. The organic cation and inorganic anion inter-act through N-H?Cl and C-H?Cl hydrogen bonds, forming a three-dimensional network.

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