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1-(2-Aza-niumyleth-yl)piperazine-1,4-diium trinitrate.

ABSTRACT: In the title salt, C(6)H(18)N(3) (3+)·3NO(3) (-), the piperazine ring adopts a chair conformation and the ethyl-ammonium group is equatorial relative to the piperazine ring, and in an all-trans conformation. In the crystal, strong charge-assisted N-H⋯O hydrogen bonds link the piperazinediium trications and the nitrate anions into a three-dimensional network.

SUBMITTER: Rademeyer M

PROVIDER: S-EPMC3238954 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Piperazine-1,4-diium diacetate.

Project description:In the title salt, C(4)H(12)N(2) (2+)·2C(2)H(3)O(2) (-), the piperazine-1,4-diium cation has 2/m symmetry with the NH(2) unit located on a mirror plane and the acetate anion has m symmetry with all non-H atoms and one H atom located on a mirror plane. The piperazine ring adopts a chair conformation. In the crystal, the cations are linked with the anions via N-H⋯O hydrogen bonding into chains parallel to the c axis.

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1,4-Dimethyl-piperazine-1,4-diium dibromide dihydrate.

Project description:In the title hydrated mol-ecular salt, C(6)H(16)N(2) (2+)·2Br(-)·2H(2)O, the complete 1,4-dimethyl-piperazine-1,4-diium dication is generated by crystallographic inversion symmetry and both exocyclic C-N bonds are in equatorial orientations. In the crystal, the components are linked by N-H?O and O-H?Br hydrogen bonds, generating chains propagating in [110].

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Project description:In the title compound, (C(12)H(20)N(2))[ZnCl(4)]·H(2)O, the two piperazine N atoms are protonated and the [ZnCl(4)](2-) anions adopt a slightly distorted tetra-hedral configuration. In the crystal, O-H⋯Cl hydrogen bonds link the tetra-chloridozincate anions and the water mol-ecules into corrugated inorganic chains parallel to [010]. The crystal structure is stabilized by N-H⋯Cl, N-H⋯O and O-H⋯Cl hydrogen bonds, with the N-H hydrogen bond originating from one of the two N atoms being trifurcated.

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3,3'-(Piperazine-1,4-diium-1,4-di-yl)di-propionate dihydrate.

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.

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Piperazine-1,4-diium naphthalene-1,5-disulfonate.

Project description:The title molecular salt, C(4)H(12)N(2) (2+)·C(10)H(6)O(6)S(2) (2-), consists of a piperazinium cation and a 1,5-naphthalene-disulfonate anion. Crystallographic inversion centers are situated at the center of the ring of the dication as well as at the midpoint of the central carbon-carbon bond in the dianion. In the crystal, inter-molecular N-H?O hydrogen bonds link the cations and anions.

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Project description:IN THE CRYSTAL STRUCTURE OF THE TITLE COMPOUND [SYSTEMATIC NAME: 1-methyl-piperazine-1,4-diium bis-(2,4,6-trinitro-phen-ol-ate)], C(5)H(14)N(2) (2+)·2C(6)H(2)N(3)O(7) (-), the ionic components are connected by relatively strong N-H?O hydrogen bonds into centrosymmetric six-membered conglomerates, which comprise two dications and four anions. Besides Coulombic inter-actions, only weak C-H?O inter-actions and some stacking between picrates (separation between the planes of ca. 3.4?Å but only a small overlapping) can be identified between these 'building blocks' of the crystal structure. The piperazine ring adopts a chair conformation with the methyl substituent in the equatorial position. In the picrate anions, the twist angles of the nitro groups depend on their positions relative to the phenolate O atom: it is much smaller for the NO(2) groups para to the C-O(-) group [15.23?(9)and 3.92?(14)°] than for the groups in the ortho positions [28.76?(13)-39.84?(11)°].

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Piperazine-1,4-diium bis-(3,5-dicarboxy-benzoate).

Project description:The asymmetric unit of the title salt, C(4)H(12)N(2) (2+)·2C(9)H(5)O(6) (-), comprises one half of the piperazine-1,4-diium dication lying on an inversion centre and one 3,5-dicarboxy-benzoate anion. In the crystal, the ions are linked into a two-dimensional framework parallel to (101) by N-H?O and O-H?O hydrogen bonds.

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1-(2,3-Di-methyl-phen-yl)piperazine-1,4-diium tetra-chlorido-cuprate(II).

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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1,4-Diferrocenyl-2-methyl-piperazine-1,4-diium bis-(trifluoro-acetate).

Project description:In the title compound, [Fe(2)(C(5)H(5))(2)(C(17)H(24)N(2))](CF(3)COO)(2), the cation possesses a crystallographically imposed inversion centre. The methyl group is disordered over two positions of equal occupancy. The Fe-C bond lengths to the two cyclo-penta-diene rings vary from 2.025?(6) to 2.044?(6)?Å. Inter-molecular N-H?O and C-H?O hydrogen bonds link the cations and anions into a three-dimensional network.

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