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4-Hydr-oxy-2,2,6,6-tetra-methyl-piperidinium perchlorate.

ABSTRACT: In the title salt, C(9)H(20)NO(+)·ClO(4) (-), inter-molecular hydrogen bonds are observed, which determine the crystal packing.

SUBMITTER: Cui Y

PROVIDER: S-EPMC2960976 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4-Hydr-oxy-2,2,6,6-tetra-methyl-piperidinium hydrogensulfate monohydrate.

Project description:In the title compound, C(9)H(20)NO(+)·HO(4)S(-)·H(2)O, the piperi-dinium ring adopts a chair conformation. Inter-molecular O-H?O and N-H?O hydrogen bonds form an extensive three-dimensional network, which consolidates the crystal structure.

| S-EPMC2960323 | biostudies-literature

4-Hydr-oxy-2,2,6,6-tetra-methyl-piperidinium trichloro-acetate.

Project description:In the crystal structure of the title compound, C(9)H(20)NO(+)·Cl(3)CCOO(-), the cations and anions are connected via O-H?O, N-H?O, O-H?Cl and N-H?Cl hydrogen bonding. The six-membered ring adopts a chair conformation with the hydroxyl group in an equatorial position.

| S-EPMC2960749 | biostudies-literature

4-Hydr-oxy-2,2,6,6-tetra-methyl-piperidinium chloride-hydroxonium chloride (3/1).

Project description:The crystal structure of the title compound, C(9)H(20)NO(+)·Cl(-)·0.33(H(3)O(+)·Cl(-)), is composed of 4-hydr-oxy-2,2,6,6-tetra-methyl-piperidinium cations, hydroxonium cations and chloride anions, which are connected via O-H?O, O-H?Cl and N-H?Cl hydrogen bonding. The 4-hydr-oxy-2,2,6,6-tetra-methyl-piperidinium cation and one of the two crystallographically independent chloride anions are located on a mirror plane. The hydroxonium cation is located on a threefold axis and the second crystallographically independent chloride anion is located on a sixfold rotoinversion axis. Due to symmetry, the hydroxonium cation is disordered over two positions.

| S-EPMC2960453 | biostudies-literature

2,2,6,6-Tetra-methyl-piperidinium triisopropoxysilanethiol-ate.

Project description:The crystal of the title compound, C(9)H(20)N(+)·C(9)H(21)O(3)SSi(-), is built of aggregates, each made up of two 2,2,6,6-tetra-methyl-piperidinium cations and two triisopropoxysilanethiol-ate anions. The aggregates are linked by four N-H?S bonds and correspond to an R(2) (4)(8) graph-set motif.

| S-EPMC2971351 | biostudies-literature

2,2,6,6-Tetra-methyl-piperidinium penta-chloro-benzene-thiol-ate.

Project description:In the crystal structure of the title compound, C(9)H(20)N(+)·C(6)Cl(5)S(-), two cation-anion pairs are linked by N-H?S hydrogen bonds to produce a cyclic aggregate of R(4) (2)(8) type. The dimers are interconnected via ?-? stacking [centroid-centroid distance = 3.851(2)?Å] and weak C-H?Cl hydrogen-bonding inter-actions.

| S-EPMC2960709 | biostudies-literature

4-Ammonio-2,2,6,6-tetra-methyl-piperidinium bis-(dihydrogen phosphate) monohydrate.

Project description:In the crystal structure of the title compound, C(9)H(22)N(2) (2+)·2H(2)PO(4) (-)·H(2)O, the H(2)PO(4) (-) anions are hydrogen bonded to each other, forming a ribbon parallel to the b axis. The water mol-ecules connect these ribbons via O-H⋯O hydrogen bonds. The organic cations are attached to the dihydrogen phosphate anions and water mol-ecules through N-H⋯O and C-H⋯O hydrogen bonds, forming an infinite three-dimensional network.

| S-EPMC2968974 | biostudies-literature

4-Hydroxy-2,2,6,6-tetra-methyl-piperidinium trifluoro-acetate.

Project description:The title compound, C(9)H(20)NO(+)·C(2)F(3)O(2) (-), is an important inter-mediate in the synthesis of hindered light stabilizers. The piperidinium ring adopts a chair conformation with the hydroxyl group in an equatorial position. The crystal packing is stabilized by O-H?O and N-H?O hydrogen bonds. The CF(3) group is disordered over two positions with almost equal site occupancy factors.

| S-EPMC2915329 | biostudies-other

Piperidinium 3-hydr-oxy-2-naphthoate.

Project description:The crystals of the title salt, C(5)H(12)N(+)·C(11)H(7)O(3) (-), were obtained from a methanol/water solution of 3-hydr-oxy-2-naphthoic acid and piperidine at room temperature. In the crystal structure, the piperidinium cations display a chair conformation and link with hydroxy-naphthoate anions via N-H?O and C-H?O hydrogen bonds. An intra-molecular O-H?O inter-action is also present.

| S-EPMC2960605 | biostudies-literature

2-Hydr-oxy-1,6,7,8-tetra-meth-oxy-3-methyl-anthraquinone.

Project description:The title compound, C(19)H(18)O(7), also known as chrysoobtusin, was isolated from Cassia tora L. (Leguminosae). The anthraquinone ring system is almost planar, the dihedral angle between the two benzene rings being 4.27?(4)°. The structure is stabilized by intra- and inter-molecular O-H?O and C-H?O hydrogen bonds, and by weak ?-? stacking inter-actions along the b axis, with a centroid-centroid distance between related benzene rings of 3.800?(4)?Å.

| S-EPMC2960471 | biostudies-literature

2,2,6,6-Tetra-kis(biphenyl-2-yl)-4,4,8,8-tetra-methyl-cyclo-tetra-siloxane.

Project description:The title compound, [-Si(C(12)H(9))(2)OSi(CH(3))(2)O-](2), was obtained unintentionally as the product of an attempted crystallization of caesium bis-(biphenyl-2,2'-di-yl)fluoro-silicate from dimethyl-formamide. In the crystal, the mol-ecule is located on an inversion center and the siloxane ring adopts a twist-chair conformation with the two dimethyl-substituted Si atoms lying 0.7081 (5) Å out of the plane defined by the two bis-(biphenyl-2-yl)-substituted Si atoms and the four O atoms. In each Si(C(12)H(9))(2) unit, the orientation of one terminal phenyl ring relative to the phenyl-ene ring of the other biphenyl moiety suggests a parallel displaced π-π stacking inter-action [centroid distance = 4.2377 (11) Å and dihedral angle = 15.40 (9)°].

| S-EPMC2969922 | biostudies-literature

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