scholarly journals A copper(II) paddle-wheel structure of tranexamic acid: dichloro-tetrakis[μ-4-(ammoniomethyl)cyclohexane-1-carboxylato-O,O′]dicopper(II) dichloride hexahydrate

2017 ◽  
Vol 73 (10) ◽  
pp. 1421-1425 ◽  
Author(s):  
Muhammad Altaf ◽  
Helen Stoeckli-Evans
Keyword(s):  
Hydrogen Bonds ◽  
Tranexamic Acid ◽  
Copper Chloride ◽  
Three Dimensional ◽  
Axial Position ◽  
Paddle Wheel ◽  
Pyramidal Geometry ◽  
Carboxylate Groups ◽  
Dimensional Network ◽  
Square Pyramidal Geometry

Tranexamic acid [systematic name:trans-4-(aminomethyl)cyclohexane-1-carboxylic acid], is an antifibrinolytic amino acid that exists as a zwitterion [trans-4-(ammoniomethyl)cyclohexane-1-carboxylate] in the solid state. Its reaction with copper chloride leads to the formation of a compound with a copper(II) paddle-wheel structure that crystallizes as a hexahydrate, [Cu2Cl2(C8H15NO2)4]2+·2Cl−·6H2O. The asymmetric unit is composed of a copper(II) cation, two zwitterionic tranexamic acid units, a coordinating Cl−anion and a free Cl−anion, together with three water molecules of crystallization. The whole structure is generated by inversion symmetry, with the Cu...Cu axle of the paddle-wheel dication being located about a center of symmetry. The cyclohexane rings of the zwitterionic tranexamic acid units have chair conformations. The carboxylate groups that bridge the two copper(II) cations are inclined to one another by 88.4 (8)°. The copper(II) cation is ligated by four carboxylate O atoms in the equatorial plane and by a Cl−ion in the axial position. Hence, it has a fivefold O4Cl coordination sphere with a perfect square-pyramidal geometry and aτ5index of zero. In the crystal, the paddle-wheel dications are linked by a series of N—H...Cl hydrogen bonds, involving the coordinating and free Cl−ions, forming a three-dimensional network. This network is strengthened by a series of N—H...Owater, Owater—H...Cl and Owater—H...O hydrogen bonds.

Bis(2-aminoacetato-κ2 N,O)aquanickel(II)

2006 ◽  
Vol 62 (4) ◽  
pp. m728-m730
Author(s):  
Yang-Jun Ding ◽  
Yu-Xi Sun ◽  
Nian-Wei Zhang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Three Dimensional ◽  
Apical Position ◽  
Pyramidal Geometry ◽  
Dimensional Network ◽  
Coordinated Water ◽  
Square Pyramidal Geometry

The title compound, [Ni(C2H5NO2)2(H2O)], is a mononuclear nickel(II) complex. The NiII atom is five-coordinated by two N atoms and two O atoms from two glycinate ligands in basal plane positions, and by one O atom from a coordinated water molecule in the apical position, forming a slightly distorted square-pyramidal geometry. In the crystal structure, molecules are linked through intermolecular N—H...O and O—H...O hydrogen bonds, forming a three-dimensional network.

scholarly journals Crystal structure of (perchlorato-κO)(1,4,7,10-tetraazacyclododecane-κ4N)copper(II) perchlorate

2017 ◽  
Vol 73 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Jessica L. Gray ◽  
Deidra L. Gerlach ◽  
Elizabeth T. Papish
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Ambient Temperature ◽  
Network Structure ◽  
Three Dimensional ◽  
Methanol Solution ◽  
Pyramidal Geometry ◽  
Perchlorate Ion ◽  
Dimensional Network ◽  
Square Pyramidal Geometry

The crystal structure of the title salt, [Cu(ClO4)(C8H20N4)]ClO4, is reported. The CuIIion exhibits a square-pyramidal geometry and is coordinated by the four N atoms of the neutral 1,4,7,10-tetraazacyclododecane (cyclen) ligand and an O atom from one perchlorate anion, with the second perchlorate ion hydrogen-bonded to one of the amine N atoms of the cyclen ligand. Additional N—H...O hydrogen bonds between the amine H atoms and the coordinating and non-coordinating perchlorate groups create a three-dimensional network structure. Crystals were grown from a concentrated methanol solution at ambient temperature, resulting in no co-crystallization of solvent.

scholarly journals (μ-Naphthalene-1,5-disulfonato-κ2 O 1:O 5)bis[triaqua(glycinato-κ2 N,O)copper(II)]

2012 ◽  
Vol 68 (6) ◽  
pp. m730-m730 ◽  
Author(s):  
Shan Gao ◽  
Seik Weng Ng
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Pyramidal Geometry ◽  
Dimensional Network ◽  
Square Pyramidal Geometry

In the title compound, [Cu2(C2H4NO2)2(C10H6O6S2)(H2O)6], the naphthalenedisulfonate group lies on a center of inversion and bridges two glycinate-chelated CuII atoms. The CuII atom exists in a CuNO4 square-pyramidal geometry that is distorted towards an octahedron owing to a long Cu—Osulfonate bond [2.636 (2) Å]. In the crystal, extensive N—H...O and O—H...O hydrogen bonds link adjacent molecules into a three-dimensional network

[N,N,N′-Tris(3-aminopropyl)ethylenediamine-κ5 N]nickel bis(perchlorate)

2006 ◽  
Vol 62 (7) ◽  
pp. m1713-m1715
Author(s):  
Tong-Tao Xu ◽  
Xing-You Xu ◽  
Da-Qi Wang ◽  
Jian Gao ◽  
Lu-De Lu
Keyword(s):  
Hydrogen Bonds ◽  
Network Structure ◽  
Three Dimensional ◽  
Title Complex ◽  
Asymmetric Unit ◽  
Intermolecular Hydrogen Bonds ◽  
Apical Position ◽  
Pyramidal Geometry ◽  
Dimensional Network ◽  
Square Pyramidal Geometry

The asymmetric unit of the title complex, [Ni(C11H29N5)](ClO4)2, consists of an [Ni(C11H29N5)]2+ cation and two uncoordinated perchlorate anions. The NiII atom is five-coordinated in a slightly distorted square-pyramidal geometry, with four of the N atoms forming the basal plane and the fifth N atom in the apical position. The complex shows a three-dimensional network structure assembled by intermolecular hydrogen bonds.

scholarly journals Poly[di-μ9-citrato-tetrasodiumzinc]

2013 ◽  
Vol 69 (12) ◽  
pp. m672-m672 ◽  
Author(s):  
Yu-Hong Ma ◽  
Hong-Wei Yang ◽  
Jing-Tuan Hao ◽  
Pi-Zhuang Ma ◽  
Ting Yao
Keyword(s):  
Three Dimensional ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Inversion Center ◽  
Asymmetric Unit ◽  
Pyramidal Geometry ◽  
Carboxylate Groups ◽  
Dimensional Network ◽  
Distorted Octahedral ◽  
Square Pyramidal Geometry

In the title compound, [Na4Zn(C6H5O7)2]n, the ZnIIion lies on an inversion center and is coordinated by six O atoms from two citrate ligands, forming a distorted octahedral geometry. There are two crystallographically independent Na+cations in the asymmetric unit. One Na+cation exhibits a distorted square-pyramidal geometry defined by five O atoms from four citrate ligands. The other Na+cation is surrounded by six O atoms from five citrate ligands in a distorted octahedral geometry. The Na+cations are bridged by citrate carboxylate groups, forming a layer parallel to (100). The layers are further assembled into a three-dimensional network with the [Zn(citrate)2]4−building units as `pillars'; O—H...O hydrogen bonds also stabilize the structure.

scholarly journals Crystal structure of triethyl 2-(5-nitro-2H-indazol-2-yl)propane-1,2,3-tricarboxylate

2015 ◽  
Vol 71 (10) ◽  
pp. o780-o781 ◽  
Author(s):  
Mohammed Boulhaoua ◽  
Mohammed Benchidmi ◽  
El Mokhtar Essassi ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Site Occupancy ◽  
Maximum Deviation ◽  
Compound C ◽  
Carboxylate Groups ◽  
Dimensional Network ◽  
Fused Ring ◽  
The Mean ◽  
Fused Ring System

In the title compound, C19H23N3O8, the 5-nitro-2H-indazol-2-yl unit is almost planar, with the maximum deviation from the mean plane being 0.024 (2) Å. The fused-ring system is nearly perpendicular to the three carboxylate groups, with dihedral angles of 90.0 (3), 83.8 (1) and 80.4 (1)°. The ethyl groups attached to both ends of the propane chain are each disordered over two sets of sites, with site-occupancy ratios of 0.425 (17):0.575 (17) and 0.302 (15):0.698 (15). In the crystal, molecules are linked by pairs of C—H...N hydrogen bonds, forming inversion dimers. The dimers are further linked by C—H...O hydrogen bonds, forming a three-dimensional network.

catena-Poly[[triaquazinc(II)]-μ-5-hydroxyisophthalato-κ2 O:O′]

2006 ◽  
Vol 62 (4) ◽  
pp. m731-m733 ◽  
Author(s):  
Hong-Ping Xiao
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Coordination Mode ◽  
Three Dimensional ◽  
Zigzag Chain ◽  
Intermolecular Hydrogen Bonds ◽  
Carboxylate Groups ◽  
Dimensional Network

In the title compound, [Zn(C8H4O5)(H2O)3] n , the ZnII atom is in a five-coordinated environment defined by three aqua O atoms and two carboxylate O atoms from two different 5-hydroxyisophthalate dianions. In the 5-hydroxyisophthalate dianions, two carboxylate groups coordinate two ZnII cations in a bidentate bridging coordination mode, forming a zigzag chain. In addition, O—H...O intermolecular hydrogen bonds link the chains into a three-dimensional network.

[2,5-Bis(2,2′-bipyridyl-6-yl)-3,4-diazahexa-2,4-diene]dichloridomanganese(II): from a mononuclear compound to a three-dimensional supramolecular framework through C—H...Cl hydrogen bonds and π–π stacking interactions

2014 ◽  
Vol 70 (7) ◽  
pp. 718-721
Author(s):  
Zhengliang Lu ◽  
Yuanchao Zhao ◽  
Baolian Chen ◽  
Ximing Huang ◽  
Chunhua Fan
Keyword(s):  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Stacking Interactions ◽  
Dimensional Chain ◽  
Supramolecular Framework ◽  
One Dimensional ◽  
Pyramidal Geometry ◽  
Π Stacking ◽  
Square Pyramidal Geometry ◽  
Multifunctional Ligand

The title compound, [MnCl2(C24H20N6)], has been synthesized and characterized based on the multifunctional ligand 2,5-bis(2,2′-bipyridyl-6-yl)-3,4-diazahexa-2,4-diene (L). The MnIIcentre is five-coordinate with an approximately square-pyramidal geometry. TheLligand acts as a tridendate chelating ligand. The mononuclear molecules are bridged into a one-dimensional chain by two C—H...Cl hydrogen bonds. These chains are assembled into a two-dimensional layer through π–π stacking interactions between adjacent uncoordinated bipyridyl groups. Furthermore, a three-dimensional supramolecular framework is attained through π–π stacking interactions between adjacent coordinated bipyridyl groups.

scholarly journals Syntheses and crystal structures of a new pyrazine dicarboxamide ligand, N 2,N 3-bis(quinolin-8-yl)pyrazine-2,3-dicarboxamide, and of a copper perchlorate binuclear complex

2020 ◽  
Vol 76 (3) ◽  
pp. 332-338
Author(s):  
Dilovan S. Cati ◽  
Helen Stoeckli-Evans
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Copper Atom ◽  
Binuclear Complex ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Pyramidal Geometry ◽  
Difference Fourier ◽  
Square Pyramidal Geometry

The title pyrazine dicarboxamide ligand, N 2,N 3-bis(quinolin-8-yl)pyrazine-2,3-dicarboxamide (H2L1), C24H16N6O2, has a twisted conformation with the outer quinoline groups being inclined to the central pyrazine ring by 9.00 (6) and 78.67 (5)°, and by 79.94 (4)° to each other. In the crystal, molecules are linked by C—H...O hydrogen bonds, forming layers parallel to the (10\overline{1}) plane, which are in turn linked by offset π–π interactions [intercentroid distances 3.4779 (9) and 3.6526 (8) Å], forming a supramolecular three-dimensional structure. Reaction of the ligand H2L1 with Cu(ClO4)2 in acetonitrile leads to the formation of the binuclear complex, [μ-(3-{hydroxy[(quinolin-8-yl)imino]methyl}pyrazin-2-yl)[(quinolin-8-yl)imino]methanolato]bis[diacetonitrilecopper(II)] tris(perchlorate) acetonitrile disolvate, [Cu2(C24H15N6O2)(CH3CN)4](ClO4)3·2CH3CN or [Cu2(HL1−)(CH3CN)4](ClO4)3·2CH3CN (I). In the cation of complex I, the ligand coordinates to the copper(II) atoms in a bis-tridentate fashion. A resonance-assisted O—H...O hydrogen bond is present in the ligand; the position of this H atom was located in a difference-Fourier map. Both copper(II) atoms are fivefold coordinate, being ligated by three N atoms of the ligand and by the N atoms of two acetonitrile molecules. The first copper atom has a perfect square-pyramidal geometry while the second copper atom has a distorted shape. In the crystal, the cation and perchlorate anions are linked by a number of C—H...O hydrogen bonds, forming a supramolecular three-dimensional structure.

scholarly journals Crystal structure of di-μ-hydroxido-bis{aqua[ethyl (1,10-phenanthrolin-3-yl)phosphonato-κ2N,N′]copper(II)} heptahydrate

2018 ◽  
Vol 74 (12) ◽  
pp. 1751-1754
Author(s):  
Alexander Yu. Mitrofanov ◽  
Yoann Rousselin
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Binuclear Complex ◽  
Three Dimensional ◽  
Water Molecules ◽  
Hydroxyl Groups ◽  
Pyramidal Geometry ◽  
Square Pyramidal Geometry

In the title compound, [Cu2(OH)2{C12H7N2(PO3C2H5)}2(H2O)2]·7H2O, two Cu2+cations are bridged by two hydroxide groups, forming a centrosymmetric binuclear complex. Each Cu2+cation is further coordinated by the N atoms of a bidentate ethyl (1,10-phenanthrolin-3-yl)phosphonate anion and a water molecule in a square-pyramidal geometry. In the crystal, a network of O—H...O hydrogen bonds involving the P(O)(O−)(OEt) groups, bridging hydroxyl groups, coordinated and uncoordinated water molecules generates a three-dimensional supramolecular structure. The ethyl group exhibits disorder and was modelled over three sites with occupancies of 0.455, 0.384 and 0.161.

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