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A polymorph of tetra-ethyl-ammonium chloride.

ABSTRACT: The structure of the title compound, C(8)H(20)N(+)·Cl(-), is compared with a polymorph that was described earlier in the same space group. Differences in the conformations of the ethyl groups of the cation exist between the polymorphs. This study is given here in order to provide additional unit-cell data for use in qualitative identification of crystalline samples obtained in syntheses in which Et(4)N(+)·Cl(-) is either used or generated.

SUBMITTER: Yan Y

PROVIDER: S-EPMC2969402 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature

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A polymorph of tetra-ethyl-ammonium chloride.

Yan Yong Y Mague Joel T JT Donahue James P JP

Acta crystallographica. Section E, Structure reports online 20090606 Pt 7

The structure of the title compound, C(8)H(20)N(+)·Cl(-), is compared with a polymorph that was described earlier in the same space group. Differences in the conformations of the ethyl groups of the cation exist between the polymorphs. This study is given here in order to provide additional unit-cell data for use in qualitative identification of crystalline samples obtained in syntheses in which Et(4)N(+)·Cl(-) is either used or generated. ...[more]

PMID: 21582792

Similar Datasets

Crystal structure of tetra-ethyl-ammonium chloride 3,4,5,6-tetra-fluoro-1,2-di-iodo-benzene.

Project description:Equimolar qu-anti-ties of tetra-ethyl-ammonium chloride (Et4NCl) and 3,4,5,6-tetra-fluoro-1,2-di-iodo-benzene (o-DITFB or o-C6F4I2) have been co-crystallized in a solution of di-chloro-methane yielding a pure halogen-bonded compound, 3,4,5,6-tetra-fluoro-1,2-di-iodo-benzene-tetra-ethyl ammonium chloride (2/1), Et4N(+)·Cl(-)·2C6F4I2, in the form of translucent needles. [(Et4NCl)(o-C6F4I2)2] packs in the C2/c space group. The asymmetric unit includes one mol-ecule of DITFB, one Et4N(+) cation located on a twofold rotation axis, and one chloride anion also located on a twofold rotation symmetry axis. This compound has an inter-esting halogen-bonding environment surrounding the halide. Here, the chloride anion acts as a tetra-dentate halogen bond acceptor and forms a distorted square-pyramidal geometry, with I?Cl(-)?I angles of 80.891?(6) and 78.811?(11)°, where two crystallographically distinct iodine atoms form halogen bonds with the chloride anion. Resulting from that square-pyramidal geometry are short contacts between some of the adjacent F atoms. Along the b axis, the halogen-bonding inter-action results in a polymeric network, producing a sheet in which the two closest chloride ions are 7.8931?(6)?Å apart. The Et4N(+) cation alternates in columns with the halide ion. The expected short contacts (shorter than the sum of their van der Waals radii) are observed for the halogen bonds [3.2191?(2) and 3.2968?(2)?Å], as well as almost linear angles [170.953?(6) and 173.529?(6)°].

| S-EPMC4420113 | biostudies-literature

Tetra-ethyl-ammonium bicarbonate trihydrate.

Project description:In the title compound, C(8)H(20)N(+)·CHO(3) (-)·3H(2)O, the bicarbon-ate anion, which has a small mean deviation from the plane of 0.0014?Å, fully utilises its three O and one H atom to form various O-H?O hydrogen bonds with the three water mol-ecules in the asymmetric unit, generating a hydrogen-bonded layer, which extends along (10[Formula: see text]). The tetra-ethyl-ammonium cations, as the guest species, are accommodated between every two neighboring layers, constructing a sandwich-like structure with an inter-layer distance of 7.28?Å.

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Project description:The asymmetric unit of the title compound, C(8)H(20)N(+)·C(4)H(5)O(5) (-)·1.36H(2)O, contains two independent ion pairs, with similar conformations, and three water mol-ecules of crystallization, one water mol-ecule haing a site-occupancy factor of 0.721 (5). Intra-molecular O-H⋯O hydrogen bonds, involving the hydr-oxy groups and an O atom of each carboxyl-ate anion, generate five-membered rings involving S(5) ring motifs. In the crystal structure, mol-ecules are linked together by water mol-ecules through four-membered O-H⋯O-H⋯O-H inter-actions to form one-dimensional infinite chains along the a axis. Since the mol-ecules are also linked into one-dimensional infinite chains along the b axis, mol-ecular sheets parallel to the (001) plane are created. Overall, the crystal structure is stabilized by two intra-molecular O-H⋯O hydrogen bonds, nine inter-molecular O-H⋯O and ten C-H⋯O hydrogen bonds.

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Project description:Crystals of the title compound, (C(6)H(5)CH(2)CH(2)NH(3))(2)[CoCl(4)], were grown by the solvent-evaporation method. This inorganic-organic hybrid compound exhibits a layered structure in which isolated CoCl(4) inorganic layers alternate with bilayers of phenylethylammonium cations. Although the inorganic anion is zero-dimensional, the layered structure is stabilized via N-H?Cl hydrogen bonds. The CoCl(4) tetra-hedra connect to the cations through N-H?Cl hydrogen bonds, building a two-dimensional network extending parallel to (010).

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Project description:In the title compound, (C(8)H(20)N)[ReBr(C(5)H(7)O(2))(CO)(3)], the Re(I) atom in the rhenate anion is surrounded by three carbonyl ligands orientated in a facial arrangement, a bromide ligand and an acetyl-acetonate ligand, leading to a distorted octa-hedral ReC(3)BrO(2) coordination with a O-Re-O bite angle of 85.66?(7)°. An array of C-H?O and C-H?Br hydrogen-bonding inter-actions between the cations and the surrounding rhenate anions stabilize the crystal structure.

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