scholarly journals Diaquabis(1H-imidazole-4-carboxylato-κ2N3,O)cobalt(II)

2013 ◽  
Vol 69 (2) ◽  
pp. m94-m94 ◽  
Author(s):  
Beñat Artetxe ◽  
Leire San Felices ◽  
Aroa Pache ◽  
Santiago Reinoso ◽  
Juan M. Gutiérrez-Zorrilla
Keyword(s):  
Crystal Packing ◽  
Rotation Axis ◽  
Three Dimensional ◽  
Water Molecules ◽  
Coordination Geometry ◽  
Carboxylate Ligands ◽  
Dimensional Network ◽  
Centroid Distance ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

The title compound, [Co(C4H3N2O2)2(H2O)2], contains a CoIIcation on a twofold rotation axis, exhibiting a distorted octahedral coordination geometry. The equatorial plane is formed by twoN,O-bidentate 1H-imidazole-4-carboxylate ligands and the axial positions are occupied by water molecules. The crystal packing consists of a three-dimensional network stabilized by O—H...O and N—H...O hydrogen bonds, together with weak π–π interactions [centroid–centroid distance = 3.577 (2) Å] between the imidazole rings.

scholarly journals Crystal structure of (2-amino-7-methyl-4-oxidopteridine-6-carboxylato-κ3O4,N5,O6)aqua(1,10-phenanthroline-κ2N,N′)zinc trihydrate

2015 ◽  
Vol 71 (9) ◽  
pp. m162-m163
Author(s):  
Siddhartha S. Baisya ◽  
Baidyanath Ghosh ◽  
Parag S. Roy
Keyword(s):  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Carboxylate Ligand ◽  
Water Molecules ◽  
Coordination Geometry ◽  
Complex Molecules ◽  
Distorted Octahedral Coordination ◽  
Dimensional Network ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

In the title compound, [Zn(C8H5N5O3)(C12H8N2)(H2O)]·3H2O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate ligand, a bidentate ancillary 1,10-phenanthroline (phen) ligand and a water molecule complete a distorted octahedral coordination geometry around the ZnIIatom. The pterin ligand forms two chelate rings. The phen and pterin ring systems are nearly perpendicular [dihedral angle = 85.16 (5)°]. Classical N—H...O, O—H...N and O—H...O hydrogen bonds and weak C—H...O hydrogen bonds link the complex molecules and lattice water molecules into a three-dimensional network. π–π stacking contacts are observed as well, with centroid-to-centroid distances of 3.5679 (14), 3.7004 (14), 3.6641 (15), 3.6974 (13) and 3.3412 (12) Å.

scholarly journals Bis(4′-chloro-2,2′:6′,2′′-terpyridine-κ3 N,N′,N′′)ruthenium(II) dichloride dihydrate

2012 ◽  
Vol 68 (6) ◽  
pp. m777-m778 ◽  
Author(s):  
Ying Wang ◽  
Rui Jiao ◽  
Xiang-Lei Qiu ◽  
Jian Wang ◽  
Wei Huang
Keyword(s):  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Maximum Deviation ◽  
Water Molecules ◽  
Coordination Geometry ◽  
Distorted Octahedral Coordination ◽  
Dimensional Network ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral ◽  
Terpyridine Ligands

In the cation of the title compound, [Ru(C15H10ClN3)2]Cl2·2H2O, the metal atom exhibits a distorted octahedral coordination geometry provided by the N atoms of two tridentate terpyridine ligands. The ligands are approximately planar [maximum deviation = 0.156 (5) Å] and form a dihedral angle of 87.0 (3)°. In the crystal, the cations, anions and water molecules are linked into a three-dimensional network by C—H...Cl, C—H...O and O—H...Cl hydrogen bonds.

scholarly journals Bis(5-amino-1H-tetrazole-κN4)diaqua(oxalato-κ2O1,O2)cadmium

2013 ◽  
Vol 69 (12) ◽  
pp. m645-m646
Author(s):  
Qian Liang ◽  
Yulin Wang ◽  
Yan Zhao ◽  
Gaojuan Cao
Keyword(s):  
Three Dimensional ◽  
Title Complex ◽  
Water Molecules ◽  
Coordination Geometry ◽  
Complex Molecules ◽  
Distorted Octahedral Coordination ◽  
Dimensional Network ◽  
Oxalate Ligand ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

In the monomeric title complex, [Cd(C2O4)(CH3N5)2(H2O)2], the CdIIion exhibits a distorted octahedral coordination geometry, with the equatorial plane defined by two O atoms from an oxalate ligand and two N atoms from two 5-amino-1H-tetrazole ligands; the axial sites are occupied by two water molecules, with longer Cd—O bond lengths. An intramolecular N—H...O hydrogen bond occurs. In the crystal, N—H...O as well as O—H...O and O—H...N hydrogen bonds (some of which are bifurcated) link the complex molecules into a three-dimensional network.

scholarly journals Crystal structure of tetraaquabis(3,5-diamino-4H-1,2,4-triazol-1-ium)cobalt(II) bis[bis(pyridine-2,6-dicarboxylato)cobaltate(II)] dihydrate

2015 ◽  
Vol 71 (6) ◽  
pp. m139-m140 ◽  
Author(s):  
Atim Johnson ◽  
Justina Mbonu ◽  
Zahid Hussain ◽  
Wan-Sin Loh ◽  
Hoong-Kun Fun
Keyword(s):  
Three Dimensional ◽  
Water Molecules ◽  
Anionic Complex ◽  
Coordination Geometry ◽  
Asymmetric Unit ◽  
Cationic Complex ◽  
Dimensional Network ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral ◽  
The Mean

The asymmetric unit of the title compound, [Co(C2H6N5)2(H2O)4][Co(C7H3NO4)2]2·2H2O, features 1.5 CoIIions (one anionic complex and one half cationic complex) and one water molecule. In the cationic complex, the CoIIatom is located on an inversion centre and is coordinated by two triazolium cations and four water molecules, adopting an octahedral geometry where the N atoms of the two triazolium cations occupy the axial positions and the O atoms of the four water molecules the equatorial positions. The two triazole ligands are parallel offset (with a distance of 1.38 Å between their planes). In the anionic complex, the CoIIion is six-coordinated by two N and four O atoms of the two pyridine-2,6-dicarboxylate anions, exhibiting a slightly distorted octahedral coordination geometry in which the mean plane of the two pyridine-2,6-dicarboxylate anions are almost perpendicular to each other, making a dihedral angle of 85.87 (2)°. In the crystal, molecules are linked into a three-dimensional networkviaC—H...O, C—H...N, O—H...O and N—H...O hydrogen bonds.

scholarly journals Poly[[aqua(μ2-4,4′-bipyridine-κ2N:N′)[μ3-3-bromo-2-(carboxylatomethyl)benzoato-κ3O1:O1′:O2]cadmium] monohydrate]

2012 ◽  
Vol 68 (8) ◽  
pp. m1071-m1071
Author(s):  
Yangmei Liu ◽  
Kai Cao ◽  
Fenglin Wang
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Three Dimensional ◽  
Coordination Geometry ◽  
Distorted Octahedral Coordination ◽  
Dimensional Network ◽  
Centroid Distance ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral ◽  
Benzene Rings

In the title compound, {[Cd(C9H5BrO4)(C10H8N2)(H2O)]·H2O}n, the CdIIatom has a distorted octahedral coordination geometry. Two N atoms from two 4,4′-bipyridine (bipy) ligands occupy the axial positions, while the equatorial positions are furnished by three carboxylate O atoms from three 3-bromo-2-(carboxylatomethyl)benzoate (bcb) ligands and one O atom from a water molecule. The bipy and bcb ligands link the CdIIatoms into a three-dimensional network. O—H...O hydrogen bonds and π–π interactions between the pyridine and benzene rings [centroid–centroid distance = 3.736 (4) Å] are present in the crystal.

scholarly journals Bis(3-aminopyrazine-2-carboxylato-κ2N1,O)diaquacobalt(II)

2013 ◽  
Vol 69 (2) ◽  
pp. m129-m130 ◽  
Author(s):  
Rafika Bouchene ◽  
Sofiane Bouacida ◽  
Fadila Berrah ◽  
Ratiba Belhouas ◽  
Hocine Merazig
Keyword(s):  
Crystal Packing ◽  
Rotation Axis ◽  
Three Dimensional ◽  
Water Molecules ◽  
Amino Groups ◽  
Coordination Environment ◽  
Dimensional Network ◽  
Carboxylate Anions ◽  
Distorted Octahedral ◽  
Distorted Octahedral Coordination Environment

In the title compound, [Co(C5H4N3O2)2(H2O)2], the CoIIatom is situated on a twofold rotation axis and isN,O-chelated by two 3-aminopyrazine-2-carboxylate anions and additionally bonded to the O atoms of two water molecules, leading to a slightly distorted octahedral coordination environment. The crystal packing is dominated by intermolecular O—H...O, O—H...N and N—H...O hydrogen bonding involving the water molecules and amino groups as donors and carboxylate O atoms, as well as the non-coordinating heterocyclic N atoms as acceptors, resulting in a three-dimensional network. An intramolecular N—H...O hydrogen bond is also observed.

scholarly journals Crystal structure ofcatena-poly[[diaquabis(4-formylbenzoato-κO1)cobalt(II)]-μ-pyrazine-κ2N:N′]

2015 ◽  
Vol 71 (4) ◽  
pp. 339-341 ◽  
Author(s):  
Gülçin Şefiye Aşkın ◽  
Fatih Çelik ◽  
Nefise Dilek ◽  
Hacali Necefoğlu ◽  
Tuncer Hökelek
Keyword(s):  
Hydrogen Bonds ◽  
Rotation Axis ◽  
Three Dimensional ◽  
Water Molecules ◽  
Carboxylate Group ◽  
Polymeric Compound ◽  
Distorted Octahedral Coordination ◽  
Linear Chains ◽  
Dimensional Network ◽  
Distorted Octahedral

In the title polymeric compound, [Co(C8H5O3)2(C4H4N2)(H2O)2]n, the CoIIatom is located on a twofold rotation axis and has a slightly distorted octahedral coordination sphere. In the equatorial plane, it is coordinated by two carboxylate O atoms of two symmetry-related monodentate formylbenzoate anions and by two N atoms of two bridging pyrazine ligands. The latter are bisected by the twofold rotation axis. The axial positions are occupied by two O atoms of the coordinating water molecules. In the formylbenzoate anion, the carboxylate group is twisted away from the attached benzene ring by 7.50 (8)°, while the benzene and pyrazine rings are oriented at a dihedral angle of 64.90 (4)°. The pyrazine ligands bridge the CoIIcations, forming linear chains running along theb-axis direction. Strong intramolecular O—H...O hydrogen bonds link the water molecules to the carboxylate O atoms. In the crystal, weak O—Hwater...Owaterhydrogen bonds link adjacent chains into layers parallel to thebcplane. The layers are linkedviaC—Hpyrazine...Oformylhydrogen bonds, forming a three-dimensional network. There are also weak C—H...π interactions present.

scholarly journals Crystal structure and Hirshfeld analysis of trans-bis(5-fluoroindoline-2,3-dione 3-oximato-κ2 O 2,N 3)-trans-bis(pyridine-κN)copper(II)

2018 ◽  
Vol 74 (4) ◽  
pp. 428-432
Author(s):  
Ana Paula Lopes de Melo ◽  
Leandro Bresolin ◽  
Bianca Barreto Martins ◽  
Vanessa Carratu Gervini ◽  
Adriano Bof de Oliveira
Keyword(s):  
Crystal Structure ◽  
Crystal Packing ◽  
Three Dimensional ◽  
Molar Ratio ◽  
Pyridine Ligands ◽  
Dimensional Network ◽  
Centroid Distance ◽  
Distorted Octahedral ◽  
Hirshfeld Analysis ◽  
Isatin Derivatives

The reaction in methanol of CuII acetate monohydrate with 5-fluoroisatin 3-oxime deprotonated with KOH in a 1:2 molar ratio and recrystallization from pyridine yielded the title compound, [Cu(C8H4FN2O2)2(C5H5N)2]. In the centrosymmetric complex, the anionic form of the isatin oxime acts as a κ2 N,O donor, building five-membered metallarings. The CuII cation is sixfold coordinated in a slightly distorted octahedral environment by two trans, equatorial, anionic isatin derivatives and two trans pyridine ligands in axial positions. The complexes are linked by hydrogen bonding into a three-dimensional network, which is also stabilized by π–π stacking interactions [centroid-to-centroid distance = 3.7352 (9) Å] and C—H...π contacts. The Hirshfeld surface analysis indicates that the major contributions for the crystal packing are H...H (31.80%), H...C (24.30%), H...O (15.20%) and H...F (10.80%). This work is the second report in the literature of a crystal structure of a coordination compound with isatin 3-oxime ligands (coordination chemistry).

Poly[[μ-(1-azaniumylethane-1,1-diyl)bis(hydrogen phosphonato)]sodium]: a powder X-ray diffraction study

2013 ◽  
Vol 69 (8) ◽  
pp. 815-818 ◽  
Author(s):  
Mwaffak Rukiah ◽  
Thaer Assaad
Keyword(s):  
Hydrogen Bonding ◽  
Rietveld Method ◽  
Three Dimensional ◽  
Coordination Geometry ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dimensional Network ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

The title two-dimensional coordination polymer, [Na(C2H8NO6P2)]n, was characterized using powder X-ray diffraction data and its structure refined using the Rietveld method. The asymmetric unit contains one Na+cation and one (1-azaniumylethane-1,1-diyl)bis(hydrogen phosphonate) anion. The central Na+cation exhibits distorted octahedral coordination geometry involving two deprotonated O atoms, two hydroxy O atoms and two double-bonded O atoms of the bisphosphonate anion. Pairs of sodium-centred octahedra share edges and the pairs are in turn connected to each other by the biphosphonate anion to form a two-dimensional network parallel to the (001) plane. The polymeric layers are connected by strong O—H...O hydrogen bonding between the hydroxy group and one of the free O atoms of the bisphosphonate anion to generate a three-dimensional network. Further stabilization of the crystal structure is achived by N—H...O and O—H...O hydrogen bonding.<!?tpb=18.7pt>

scholarly journals Diaquabis(4-formylbenzoato-κO1)bis(nicotinamide-κN1)zinc

2012 ◽  
Vol 68 (8) ◽  
pp. m1127-m1128 ◽  
Author(s):  
Mustafa Sertçelik ◽  
Nagihan Çaylak Delibaş ◽  
Hacali Necefoğlu ◽  
Tuncer Hökelek
Keyword(s):  
Benzene Ring ◽  
Dihedral Angle ◽  
Three Dimensional ◽  
Water Molecules ◽  
Carboxylate Group ◽  
Dimensional Network ◽  
Centroid Distance ◽  
Square Planar ◽  
Distorted Octahedral ◽  
Benzene Rings

In the title complex, [Zn(C8H5O3)2(C6H6N2O)2(H2O)2], the ZnIIcation is located on an inversion center and is coordinated by two 4-formylbenzoate (FB) anions, two nicotinamide (NA) ligands and two water molecules. The four O atoms in the equatorial plane around the ZnIIcation form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxylate group and the adjacent benzene ring is 24.13 (8)°, while the pyridine ring and the benzene ring are oriented at a dihedral angle of 88.52 (4)°. The coordinating water molecule links with the carboxylate groupviaan O—H...O hydrogen bond. In the crystal, N—H...O and O—H...O hydrogen bonds, and a weak C—H...π interaction link the molecules into a two-dimensional network parallel to (010). These networks are linkedviaC—H...O and π–π interactions between inversion-related benzene rings [centroid–centroid distance = 3.8483 (7) Å], forming a three-dimensional supramolecular structure.

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