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15 citations found for Sun, Y.Q.
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The crystal structure of the title compound, (C4H12N2)[Co(H2O)6](SO4)2, is built of [Co(H2O)6]2+ cations, diprotonated piperazinium cations (each of the two crystallographically independent piperazinium cations occupies a special position on an inversion centre) and sulfate anions. The Co atom is coordinated by six water molecules in a slightly distorted octahedral geometry. The cations are linked to anions by N—H
O and O—H
O hydrogen bonds, forming an extensive three-dimensional hydrogen-bond network in the crystal structure.
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The crystal structure of the title compound, [Zn(H2O)6][C10H4O8], features a three-dimensional hydrogen-bonded network linking octahedral hexaaquazinc(II) dications, occupying special positions on twofold axes, and dihydrogen-1,2,4,5-benzenetetracarboxylate dianions located on crystallographic inversion centres. There are also intramolecular hydrogen bonds between adjacent carboxyl groups in the dianions.
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The title compound, C16H11ClN3O2+·I3-, consists of a bipyridinium cation and a triiodide anion. The two pyridine rings of the cation are not coplanar, with a dihedral angle of 28.83 (4)°. The benzene ring is also twisted out of the mean plane of the adjoining pyridine ring by 64.27 (5)°. The I3- anions are slightly bent and asymmetric, with an I-I-I angle of 178.24 (5)° and I-I bond distances of 2.937 (2) and 2.957 (2) Å. The packing shows a columnar arrangement, with parallel stacks of bipyridinium and I3- ions along the b axis.
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The title compound, poly[ammonium zinc-μ-benzene-1,2,4,5-tetracarboxylate octahydrate] {(NH4)2Zn[C6H2(COO)4]·8H2O}n, forms a three-dimensional network containing one-dimensional nanoporous rhomboid channels along the c axis, accommodating guest water molecules and the ammonium cations. The dimensions of the large channel are 11.555 (2) × 15.00 (1) Å. The network consists of [Zn(C6H2(COO)4]2− anions containing tetrahedral Zn atoms bonded to four carboxylate groups. The Zn
O distances range from 1.974 (2) to 1.978 (2) Å. The ammonium cations and the water molecules are associated in a centrosymmetric network by intermolecular hydrogen bonds. The hydrogen bonding is essential to stabilize the crystal structure.
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A new cadmium coordination polymer, [Cd(C5H2N2O4)(H2O)2]n, possesses a one-dimensional zigzag chain structure built from CdII centers bridged sequentially by pairs of O and N atoms of the 5-carboxyimidazole-4-carboxylate ligand. The CdII center is in a distorted octahedral geometry, being coordinated by two O atoms from two coordinated water molecules [Cd—O = 2.322 (7) and 2.364 (7) Å], and by two N atoms [Cd—N = 2.222 (6) and 2.232 (6) Å] and two carboxyl O atoms [Cd—O = 2.383 (6) and 2.414 (6) Å] from two 5-carboxyimidazole-4-carboxylate ligands.
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In the title compound, [Cu(C22H24N6O2)], the copper(II) ion is coordinated by five N atoms from the chelating macrocyclic ligand, forming a distorted square-pyramidal geometry. The complexes associate as dimers, disposed about a centre of symmetry, linked through weak intermolecular Cu
O coordination and N—H
O hydrogen bonding.
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The title compound, [Co(C22H26N6O2)]ClO4, was prepared from diformyloxanilide, cobalt(II) perchlorate and 1,3-propanediamine. The crystal structure contains a complex cobalt(III) cation and a perchlorate anion. Cobalt is coordinated by six N atoms from the anilide ligand in chelating mode, forming a distorted octahedral geometry. Inter-cation hydrogen bonds are present in the crystal structure.
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The title compound, guanidinium pyromellitate, 2[C(NH2)3]+·(C10H4O8)2− or 2 CH6N3+·C10H4O82−, comprises a 1,2,4,5-benzenetetracarboxylate anion and two guanidinium cations. The carboxylate anions lie on centers of inversion and involve intramolecular O—H
O hydrogen bonds. The cations and anions are linked by strong three-dimensional N—H
O hydrogen bonds and π–π-stacking interactions into a three-dimensional framework containing a one-dimensional channel along the diagonal of the ca plane. The N—H
O hydrogen-bond distances range from 2.899 (6) to 3.068 (5) Å.
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The crystal of the title compound, imidazolium trihydrogen-1,2,4,5-benzenetetracarboxylate, C3H5N2+·C10H5O8−, is built of imidazolium cations and trihydrogen-1,2,4,5-benzenetetracarboxylate anions. The anions use two of their `active' H atoms to generate hydrogen bonds linking to the neighbouring anions, thus creating a two-dimensional hydrogen-bonding network parallel to the bc plane of the crystal. The third oxygen-bound H atom of the anion is involved in an intramolecular hydrogen bond, which closes the six-membered pseudo-ring. The imidazolium cations are linked to the anionic hydrogen-bonded network through N—H
O bonds which target two of the O atoms of the carboxyl groups of the anions as acceptors. The mean plane of the imidazolium cation is almost orthogonal to the mean plane of the benzene ring of benzenetetracarboxylate, with a dihedral angle of 89.7 (1)°.
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The title compound, [Ni(en)(TETA)][GeF6] or [Ni(C2H8N2)(C6H18N4)][GeF6], was synthesized under mild solvothermal conditions in the presence of triethylenetetramine (TETA) as a base. It is a new salt composed of [GeF6]2− anions and [Ni(en)(TETA)]2+ cations. The ions are linked together by hydrogen bonding between F atoms and N—H groups. The complex cation and anion lie on twofold axes of the space group Pccn.
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[5,6:14,15-Dibenzo-1,4,8,12-tetraazacyclopentadeca-7,13-diene-2,3-dione(2–)]nickel(II) monohydrate
The nickel(II) ion in the title complex, [Ni(C19H16N4O2)]·H2O, is coordinated by four N atoms from the 5,6:14,15-dibenzo-1,4,8,12-tetraazacyclopentadeca-7,13-diene-2,3-dione(2−) ligand in chelating mode, forming a distorted square-planar geometry. The complex molecules are associated into a two-dimensional superamolecular architecture through weak intermolecular O—H
O and C—H
O hydrogen bonding.
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The title compound, [Ni(dien)2][GeF6] (dien is diethylenetriamine, C4H13N3), synthesized under mild solvothermal conditions, is a novel zero-dimensional material in which [GeF6]2− building anions are connected to [Ni(dien)2]2+ cations via hydrogen bonds between F atoms and N—H groups. Both metal atoms are located on special positions of site symmetry 2/m. Furthermore, one F and one N atom (including the attached H atom) are located on a mirror plane.
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The title compound, {(C12H13N2)2[Mo5O16]}n, was synthesized under hydrothermal conditions. The structure contains a two-dimensional layer, constructed from [(Mo4O14)n]4n− chains linked through MoO6 octahedra, which lie across twofold axes. The [(Mo4O14)n]4n− chain consists of [Mo4O14]4− clusters connected to one another by sharing their MoO5 square-pyramidal and MoO6 octahedral vertices in an anti disposition. The layers are linked by the cation, to which they are connected via N—H
O hydrogen bonds.
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The structure of the title compound, [Zn4(C2O4)(PO4)2(H2O)2]n, which was synthesized under hydrothermal conditions, consists of zinc phosphate layers joined by bridging oxalate ligands to generate a three-dimensional framework. An extended zinc phosphate layer lies parallel to the ab plane and within this layer there are helical chains, composed of ZnO6 octahedra and ZnO5 square pyramids, that run parallel to the b axis and coincide with the 21 screw element. The oxalate groups sit on crystallographic inversion centers.