132 research outputs found
Ethane-1,2-diaminium 4,5-dichlorophthalate
In the structure of the title compound, C2H10N2
2+·C8H2Cl2O4
2−, the dications and dianions form hydrogen-bonded ribbon substructures which enclose conjoint cyclic R
2
1(7), R
1
2(7) and R
4
2(8) associations and extend down the c-axis direction. These ribbons inter-associate down b, giving a two-dimensional sheet structure. In the dianions, one of the carboxylate groups is essentially coplanar with the benzene ring, while the other is normal to it [C—C—C—O torsion angles = 177.67 (12) and 81.94 (17)°, respectively]
4-Aminopyridinium cis-2-carboxycyclohexane-1-carboxylate
In the structure of the title molecular salt, C5H7N2
+·C8H11O4
−, the cis monoanions associate through short O—H⋯O hydrogen bonds in the carboxylic acid groups [graph set C(7)], forming zigzag chains which extend along the c axis. These are interlinked through pyridinium and amine N—H⋯O hydrogen bonds, giving a three-dimensional network structure
4-(2-Hydroxyethyl)anilinium 3-carboxy-4-hydroxybenzenesulfonate monohydrate
In the structure of the title compound, C8H12NO+·C7H5O6S−·H2O, isolated from the reaction of 2-(4-aminophenyl)ethanol with 5-sulfosalicylic acid, the cations form head-to-tail hydrogen-bonded chains through C
1
1(9) anilinium N+—H⋯Ohydroxyl interactions while the anions also form parallel but C
1
1(8)-linked chains through carboxylic acid O—H⋯Osulfonate interactions. These chains inter-associate through a number of N+—H⋯O and O—H⋯O bridging interactions, giving a two-dimensional array in the ab plane
Poly[di-μ-aqua-bis(μ-2-amino-4-nitrobenzoato)dicaesium]
In the structure of title compound, [Cs2(C7H5N2O4)2(H2O)2]n, the asymmetric unit contains two independent Cs atoms comprising different coordination polyhedra. One is nine-coordinate, the other seven-coordinate, both having irregular configurations. The CsO9 coordination polyhedron comprises O-atom donors from three bridging water molecules, one of which is doubly bridging, three from carboxylate groups, and three from nitro groups, of which two are bidentate chelate bridging. The CsO6N coordination polyhedron comprises the two bridging water molecules, one amine N-atom donor, one carboxylate O-atom donor and four O-atom donors from nitro groups (two from the chelate bridges). The extension of the dimeric unit gives a three-dimensional polymeric structure, which is stabilized by both intra- and intermolecular amine N—H⋯O and water O—H⋯O hydrogen bonds to carboxylate O-atom acceptors, as well as inter-ring π–π interactions [minimum ring centroid–centroid separation = 3.4172 (15) Å]
Guanidinium quinoline-2-carboxylate
In the structure of the guanidinium salt of quinaldic acid, CH6N3
+·C10H6NO2
−, the asymmetric unit contains two independent cations and anions having similar inter-species hydrogen-bonding environments, which include cyclic R
2
2(8), R
2
1(6) and R
1
2(5) associations. These and additional weak aromatic ring π–π interactions [minimum ring-centroid separation = 3.662 (2) Å] give a two-dimensional layered structure
1,1,3,3-Tetraethylisoindolin-2-ium chloride
In the title compound, C16H26N+·Cl−, the cations and anions form discrete centrosymetric cyclic dimers through N—H⋯Cl hydrogen-bonding associations with graph-set R
4
2(8)
Guanidinium 3-nitrobenzoate
The title compound, CH6N3
+·C7H4NO4
−, an anhydrous guanidinium salt, shows a N—H⋯O hydrogen-bond network in which the guanidinium cation is involved in three cyclic R
2
1(6) hydrogen-bonding associations with separate carboxylate O-atom acceptors. Further peripheral associations include a cyclic R
1
2(4) cation–anion interaction, forming interlinked undulating sheets in the three-dimensional structure
Sodium 2-nitrocinnamate dihydrate: a one-dimensional hydrogen-bonded coordination polymer
The title compound catena-poly[aquasodium-μ2-aqua-μ3-2-nitrocinnamato], [Na(C9H6NO4)(H2O)2]n, the sodium salt of trans-2-nitrocinnamic acid, is a one-dimensional coordination polymer based on six-coordinate octahedral NaO6 centres, comprising three facially related monodentate carboxylate O-atom donors from separate ligands (all bridging) [Na—O = 2.4370 (13)–2.5046 (13) Å], and three water molecules (two bridging and one monodentate) [Na—O = 2.3782 (13)–2.4404 (17) Å]. The structure is also stabilized by intra-chain water–carboxylate and water–nitro O—H⋯O hydrogen bonds
2,4-Diiodoaniline
The structure of the title compound, C6H5I2N, shows a weak intermolecular amine–amine N—H⋯N hydrogen-bonding interaction, giving a helical chain which extends along the a axis. An intramolecular N—H⋯I hydrogen bond is also observed
Guanidinium 2-phenylacetate
In the structure of the title salt, CH6N3
+·C8H7O2
−, the guanidinium cation gives three cyclic hydrogen-bonding interactions with O-atom acceptors of three independent phenylacetate anions, one R
2
2(8) and two R
2
1(6), giving one-dimensional columnar structures which extend down the 42 axis in the tetragonal cell. Within these structures, there are solvent-accessible voids of volume 86.5 Å3
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