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4,4'-Bipyridine-cyclo-hexane-1,2,4,5-tetra-carb-oxy-lic acid (1/1).

ABSTRACT: In the title 1:1 adduct, C(10)H(8)N(2)·C(10)H(12)O(8), the dihedral angle between the pyridine rings in the 4,4-bipyridine molecule is 8.33 (13)°. In the crystal, the cyclo-hexane-1,2,4,5-tetra-carb-oxy-lic acid mol-ecules inter-act with each other through inter-molecular O-H⋯O hydrogen bonds, forming an infinite chain along the a axis, which is further linked perpendicularly by O-H⋯N hydrogen bonds involving bipyridine, resulting in a supra-molecular corrugated sheet parallel to the (110) plane.

SUBMITTER: Liu JQ

PROVIDER: S-EPMC3009091 | biostudies-literature |

REPOSITORIES: biostudies-literature

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(1S*,2S*,4R*,5R*)-Cyclo-hexane-1,2,4,5-tetra-carb-oxy-lic acid.

Project description:The title compound, C10H12O8, a prospective raw material for colourless polyimides which are applied to electronic and microelectronic devices, lies about an inversion centre and the cyclo-hexane ring adopts a chair conformation. Two crystallographycally independent carb-oxy-lic acid groups on adjacent C atoms are in equatorial positions, resulting in a mutually trans conformation. In the crystal, O-H?O hydrogen bonds around an inversion centre and a threefold rotoinversion axis, respectively, form an inversion dimer with an R 2 (2)(8) motif and a trimer with an R 3 (3)(12) motif.

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2,2'-Bipyridine-cyclo-pentane-1,2,3,4-tetra-carb-oxy-lic acid (1/1).

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(1R*,2S*,4S*,5R*)-Cyclo-hexane-1,2:4,5-tetra-carb-oxy-lic dianhydride.

Project description:The title compound, C(10)H(8)O(6), a promising raw material to obtain colorless polyimides which are applied to microelectronic and optoelectronic devices, adopts a folded conformation in which the dihedral angle between the two anhydro rings is 55.15?(8)°. The central six-membered ring assumes a conformation inter-mediate between boat and twist-boat. In the crystal, mol-ecules are linked by weak C-H?O inter-actions, forming a layer parallel to the bc plane.

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4,4'-Bipyridine-2-(carb-oxy-methyl-sulfan-yl)pyridine-3-carb-oxy-lic acid (1/1).

Project description:In the title co-crystal, C(10)H(8)N(2)·C(8)H(7)NO(4)S, the formate group is coplanar with the pyridyl ring of the acid [dihedral angle = 6.2?(7)°], while the carb-oxy-methyl-sulfanyl group makes a C-S-C-C torsion angle of 70.2?(1)° with the pyridine ring. The dihedral angle between the pyridyl rings of the 4,4'-bipyridine mol-ecule is 27.4?(1)°. The acid and the 4,4'-bipyridine mol-ecules are involved in hydrogen bonding via carb-oxy-lic O and pyridyl N atoms. The structure is further consolidated by inter-molecular C-H?O hydrogen bonds, generating a three-dimensional network.

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e,e-trans-Cyclo-hexane-1,4-carb-oxy-lic acid-hexa-methyl-ene-tetra-mine (1/2).

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4-[(4-Meth-oxy-benzene-sulfonamido)-meth-yl]cyclo-hexane-1-carb-oxy-lic acid.

Project description:In the title compound, C(15)H(21)NO(5)S, two crystallographically independent mol-ecules are linked into a dimer by a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. In the crystal, mol-ecules are further linked by inter-molecular O-H⋯O hydrogen bonds into a two-dimensional network parallel to (012). Additional stabilization is provided by weak inter-molecular C-H⋯O hydrogen bonds.

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Project description:In the title compound, C(16)H(10)O(8)·H(2)O, the dihedral angle between the two benzene rings is 71.63?(5)°. In the crystal structure, pairs of inversion-related mol-ecules are stacked [mean inter-planar spacing = 3.5195?(18)?Å], and O-H?O and C-H?O hydrogen bonds create a three-dimensional network.

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4,4'-Bipyridine-pyridine-3,5-dicarb-oxy-lic acid (3/4).

Project description:In the title compound, 3C(10)H(8)N(2)·4C(7)H(5)NO(4), the asymmetric unit contains two mol-ecules of pyridine-3,5-dicarb-oxy-lic acid and one mol-ecule of 4,4'-bipyridine in general positions together with one mol-ecule of 4,4'-bipyridine lying across a centre of inversion, thus giving a 4:3 molar ratio of pyridine-3,5-dicarb-oxy-lic acid to 4,4'-bipyridine. The dihedral angle between the bipyridine rings on general positions is 21.2?(2)°. These mol-ecular units are linked by O-H?N hydrogen bonds forming an extended two-dimensional framework in the crystal.

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Crystal structure of 4-{[(2,4-di-hydroxy-benzyl-idene)amino]-meth-yl}cyclo-hexane-carb-oxy-lic acid.

Project description:In the title compound, C15H19NO4, the cyclo-hexyl ring adopts a chair conformation with both exocyclic C-C bonds in equatorial orientations. The dihedral angle between the basal plane of cyclo-hexyl ring and the 2,4-di-hydroxy-benzaldehyde moiety is 84.13 (13)°. An intra-molecular O-H⋯N hydrogen bonds closes an S(6) ring. In the crystal, Oc-H⋯Op (c = carb-oxy-lic acid, p = phenol) hydrogen bonds link the mol-ecules into [100] C(13) chains whereas an Op-H⋯Oc hydrogen bond generates [101] C(15) chains. Together, these bonds generate (010) sheets incorporating R 2 (2)(20) loops. Weak C-H⋯O and C-H⋯π inter-actions also occur.

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2,6,6-Trimethyl-cyclo-hex-2-ene-carb-oxy-lic acid.

Project description:In the title crystal structure, C(10)H(16)O(2), inversion-related mol-ecules are linked by pairs of O-H?O hydrogen bonds involving carboxyl groups to form R(2) (2)(8) dimers. The cyclo-hexene ring displays a half-chair conformation.

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