scholarly journals Crystal structures of four dimeric manganese(II) bromide coordination complexes with various derivatives of pyridine N-oxide

2019 ◽  
Vol 75 (8) ◽  
pp. 1284-1290
Author(s):  
Sheridan Lynch ◽  
Genevieve Lynch ◽  
Will E. Lynch ◽  
Clifford W. Padgett
Keyword(s):  
Hydrogen Bonding ◽  
Solvent Molecule ◽  
Bound Water ◽  
Manganese Atom ◽  
Coordination Complexes ◽  
Water Molecules ◽  
Inversion Center ◽  
Dimeric Complex ◽  
Bromide Ions ◽  
Derivatives Of

Four manganese(II) bromide coordination complexes have been prepared with four pyridine N-oxides, viz. pyridine N-oxide (PNO), 2-methylpyridine N-oxide (2MePNO), 3-methylpyridine N-oxide (3MePNO), and 4-methylpyridine N-oxide (4MePNO). The compounds are bis(μ-pyridine N-oxide)bis[aquadibromido(pyridine N-oxide)manganese(II)], [Mn2Br4(C5H5NO)4(H2O)2] (I), bis(μ-2-methylpyridine N-oxide)bis[diaquadibromidomanganese(II)]–2-methylpyridine N-oxide (1/2), [Mn2Br4(C6H7NO)2(H2O)4]·2C6H7NO (II), bis(μ-3-methylpyridine N-oxide)bis[aquadibromido(3-methylpyridine N-oxide)manganese(II)], [Mn2Br4(C6H7NO)4(H2O)2] (III), and bis(μ-4-methylpyridine N-oxide)bis[dibromidomethanol(4-methylpyridine N-oxide)manganese(II)], [Mn2Br4(C6H7NO)4(CH3OH)2] (IV). All the compounds have one unique MnII atom and form a dimeric complex that contains two MnII atoms related by a crystallographic inversion center. Pseudo-octahedral six-coordinate manganese(II) centers are found in all four compounds. All four compounds form dimers of Mn atoms bridged by the oxygen atom of the PNO ligand. Compounds I, II and III exhibit a bound water of solvation, whereas compound IV contains a bound methanol molecule of solvation. Compounds I, III and IV exhibit the same arrangement of molecules around each manganese atom, ligated by two bromide ions, oxygen atoms of two PNO ligands and one solvent molecule, whereas in compound II each manganese atom is ligated by two bromide ions, one O atom of a PNO ligand and two water molecules with a second PNO molecule interacting with the complex via hydrogen bonding through the bound water molecules. All of the compounds form extended hydrogen-bonding networks, and compounds I, II, and IV exhibit offset π-stacking between PNO ligands of neighboring dimers.

scholarly journals Structures of substituted pyridine N-oxide with manganese(II) acetate

2018 ◽  
Vol 74 (10) ◽  
pp. 1405-1410 ◽  
Author(s):  
Will Lynch ◽  
Genevieve Lynch ◽  
Kirk Sheriff ◽  
Clifford Padgett
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
General Position ◽  
Metal Ion ◽  
Bound Water ◽  
Inversion Center ◽  
The Third ◽  
Derivatives Of ◽  
Water Hydrogen

Manganese(II) acetate coordination polymers have been prepared with three derivatives of pyridine N-oxide. The compounds are catena-poly[manganese(II)-μ3-acetato-di-μ2-acetato-[aquamanganese(II)]-μ2-acetato-μ-(pyridine N-oxide)-manganese(II)-μ3-acetato-μ2-acetato-μ-(pyridine N-oxide)-[aquamanganese(II)]-di-μ2-acetato], [Mn4(CH3COO)8(C5H5NO)2(H2O)2] n , (I), catena-poly[[manganese(II)]-μ3-acetato-μ2-acetato-μ-(2-methylpyridine N-oxide)-[aquamanganese(II)]-di-μ2-acetato-manganese(II)-di-μ2-acetato-μ3-acetato-[aquamanganese(II)]-μ2-acetato-μ-(2-methylpyridine N-oxide)], [Mn4(CH3COO)8(C6H7NO)2(H2O)2] n , (II), and catena-poly[[manganese(II)-di-μ2-acetato-μ-(4-methylpyridine N-oxide)] monohydrate], {[Mn(CH3COO)2(C6H7NO)]·H2O} n , (III). Compounds (I) and (II) both have three unique Mn atoms; in both compounds two of them sit on a crystallographic inversion center while the third is on a general position. In compound (III), the single unique Mn atom sits on a general position. Pseudo-octahedral six-coordinate manganese(II) centers are found in all compounds. All of the compounds form chains of Mn atoms bridged by acetate ions and the oxygen atom of the N-oxide in pyridine N-oxide (PNO), 2-methylpyridine N-oxide (2MePNO), or 4-methylpyridine N-oxide (4MePNO). Compound (I) and (II) both exhibit a bound water of solvation. In (I), the water hydrogen bonds to a nearby acetate whereas in (II) the water molecule forms bridging hydrogen bonds between two neighboring acetates. In compound (III) a water molecule of solvation is found in the lattice, not bound to the metal ion but hydrogen bonding to a bridging acetate.

scholarly journals Structure and hydrogen bonding of the hydrated selenite and selenate ions in aqueous solution

2014 ◽  
Vol 43 (17) ◽  
pp. 6315-6321 ◽  
Author(s):  
Lars Eklund ◽  
Ingmar Persson
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bonding ◽  
Free Electron ◽  
Electron Pair ◽  
Bound Water ◽  
Water Molecules ◽  
Hydration Sphere ◽  
Free Electron Pair

The selenite ion has an asymmetric hydration sphere with loosely electrostatically bound water molecules outside the free electron pair.

Ethylenediammonium thiophene-2,5-dicarboxylate dihydrate, an acid–base complex with a three-dimensional hydrogen-bonding system

2006 ◽  
Vol 62 (7) ◽  
pp. o2951-o2952 ◽  
Author(s):  
Si-Min Wu ◽  
Ming Li ◽  
Jiang-Feng Xiang ◽  
Liang-Jie Yuan ◽  
Ju-Tang Sun
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Water Molecules ◽  
Inversion Center ◽  
Acid Base ◽  
Special Position ◽  
Compound C ◽  
Bonding System ◽  
Hydrogen Bonding System

The crystal structure of the title compound, C2H10N2 2+·C6H2O4S2−·2H2O, is built of ethylenediammonium dications, occupying a special position on an inversion center, thiophene-2,5-dicarboxylate dianions, in a special position on the twofold axis, and water molecules in general positions. All residues are involved in an extensive hydrogen-bonding system, which links them into a three-dimensional supramolecular arrangement.

scholarly journals Water Adsorption to Leaves of Tall Cryptomeria japonica Tree Analyzed by Infrared Spectroscopy under Relative Humidity Control

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1107
Author(s):  
Wakana A. Azuma ◽  
Satoru Nakashima ◽  
Eri Yamakita ◽  
Tamihisa Ohta
Keyword(s):  
Hydrogen Bonding ◽  
Relative Humidity ◽  
Cryptomeria Japonica ◽  
Water Adsorption ◽  
Bound Water ◽  
Free Water ◽  
High Water ◽  
Water Molecules ◽  
Cross Sectional ◽  
Tissue Properties

Leaf water storage is a complex interaction between live tissue properties (anatomy and physiology) and physicochemical properties of biomolecules and water. How leaves adsorb water molecules based on interactions between biomolecules and water, including hydrogen bonding, challenges our understanding of hydraulic acclimation in tall trees where leaves are exposed to more water stress. Here, we used infrared (IR) microspectroscopy with changing relative humidity (RH) on leaves of tall Cryptomeria japonica trees. OH band areas correlating with water content were larger for treetop (52 m) than for lower-crown (19 m) leaves, regardless of relative humidity (RH). This high water adsorption in treetop leaves was not explained by polysaccharides such as Ca-bridged pectin, but could be attributed to the greater cross-sectional area of the transfusion tissue. In both treetop and lower-crown leaves, the band areas of long (free water: around 3550 cm−1) and short (bound water: around 3200 cm−1) hydrogen bonding OH components showed similar increases with increasing RH, while the band area of free water was larger at the treetop leaves regardless of RH. Free water molecules with longer H bonds were considered to be adsorbed loosely to hydrophobic CH surfaces of polysaccharides in the leaf-cross sections.

Redetermination of trans-diaquabis(picolinato-κ2 N,O)cobalt(II) dihydrate

2006 ◽  
Vol 62 (4) ◽  
pp. m796-m798 ◽  
Author(s):  
Zerrin Heren ◽  
Cem Cüneyt Ersanlı ◽  
Cem Keser ◽  
Nazan Ocak Ískeleli
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Three Dimensional ◽  
Water Molecules ◽  
Inversion Center ◽  
Hydrogen Bonding Interactions ◽  
Dimensional Network ◽  
Distorted Octahedral

The crystal structure of the title compound, [Co(C6H4NO2)2(H2O)2]·2H2O, has been reinvestigated with improved precision [previous reports: Chang et al. (1972). J. Coord. Chem. 2, 31–34; Lumme et al. (1969). Suom. Kemistil. B, 42, 270]. In the title compound, the Co atom is located on an inversion center and its coordination can be described as slightly distorted octahedral, equatorially trans-coordinated by two N and O atoms of two picolinate ligands and axially coordinated by two O atoms of the water molecules. Intermolecular O—H...O and C—H...O hydrogen-bonding interactions result in the formation of an intricate three-dimensional network.

scholarly journals catena-Poly[[diaquacadmium(II)]-μ2-3-(4-carboxylatophenyl)propionato]

IUCrData ◽  
2019 ◽  
Vol 4 (7) ◽  
Author(s):  
Frederick C. Ezenyilimba ◽  
Richard J. Staples ◽  
Robert L. LaDuca
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Polymer ◽  
Title Compound ◽  
Bound Water ◽  
Polymer Chains ◽  
Water Molecules ◽  
Bonding Mechanisms ◽  
Oriented Parallel ◽  
Trigonal Prismatic

In the title compound, [Cd(C10H8O4)(H2O)2)] n , the CdII cation is coordinated in a distorted trigonal–prismatic fashion. 3-(4-Carboxyphenyl)propionate (cpp) ligands connect the CdII cations into zigzag [Cd(cpp)(H2O)2)] n coordination polymer chains, which are oriented parallel to [101]. The chains aggregate into supramolecular layers oriented parallel to (10\overline{1}) by means of O—H...O hydrogen bonding between bound water molecules and ligating cpp carboxylate O atoms. The layers stack in an ABAB pattern along [100] via other O—H...O hydrogen-bonding mechanisms also involving the bound water molecules. The crystal studied was an inversion twin.

Diaquabis(5-n-butylpyridine-2-carboxylato-κ2 N,O)nickel(II) dihydrate

2007 ◽  
Vol 63 (11) ◽  
pp. m2853-m2853 ◽  
Author(s):  
Liang Qin ◽  
Hai-Fu Guo ◽  
Xiang Li ◽  
De-Yun Ma ◽  
Wen-Dong Song
Keyword(s):  
Hydrogen Bonding ◽  
Network Motif ◽  
Water Molecules ◽  
Carboxylate Group ◽  
Two Dimensional ◽  
Inversion Center ◽  
Solvent Water ◽  
Butyl Group ◽  
Octahedral Environment ◽  
Dimensional Network

The metal atom of the title compound, [Ni(C10H13NO2)2(H2O)2]·2H2O, lies on an inversion center; it is N,O-chelated by the alkyl-substituted 2-pyridylcarboxylate group, and two water molecules complete the octahedral environment. The coordinated and solvent water molecules engage in hydrogen bonding with the acceptor O atom of the carboxylate group to furnish a two-dimensional network motif. Three atoms of the butyl group are disordered, with refined site occupancies of 0.681 (8):0.319 (8).

scholarly journals 2-((1E)-1-{2-[(2Z)-4-(4-Bromophenyl)-3-phenyl-2,3-dihydro-1,3-thiazol-2-ylidene]hydrazin-1-ylidene}ethyl)pyridin-1-ium bromide monohydrate

2014 ◽  
Vol 70 (3) ◽  
pp. o328-o329 ◽  
Author(s):  
Joel T. Mague ◽  
Shaaban K. Mohamed ◽  
Mehmet Akkurt ◽  
Ahmed T. Abd El-Alaziz ◽  
Mustafa R. Albayati
Keyword(s):  
Hydrogen Bonding ◽  
Thiazole Ring ◽  
Dihedral Angles ◽  
Water Molecules ◽  
Aromatic Rings ◽  
Axis Direction ◽  
Hydrogen Bonding Interactions ◽  
Bromide Ions ◽  
Molecular Salt

In the title hydrated molecular salt, C22H18BrN4S+·Br−·H2O, the aromatic rings make dihedral angles of 14.20 (12), 34.29 (10) and 68.75 (11)° with the thiazole ring. In the crystal, molecules are linked into chains running parallel to theaaxis by association of the bromide ions and the water molecules of crystallization with the cationsviaN—H...O, O—H...Br, C—H...N and C—H...Br hydrogen-bonding interactions. C—H...π and C—Br...π [3.7426 (11) Å, 161.73 (7)°] interactions are also observed, forming infinite chains extending along theb-axis direction.

scholarly journals Bis(5-hydroxyisophthalato-κO1)bis[4-(pyridine-3-carboxamido-κN3)pyridinium]copper(II) tetrahydrate

2013 ◽  
Vol 69 (12) ◽  
pp. m663-m663
Author(s):  
Megan E. O'Donovan ◽  
Robert L. LaDuca
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Network Structure ◽  
Title Compound ◽  
Three Dimensional ◽  
Water Molecules ◽  
Inversion Center ◽  
Dimensional Network ◽  
Square Planar ◽  
Planar Environment

In the title compound, [Cu(C11H10N3O)2(C8H4O5)2]·4H2O, the CuIIion, located on a crystallographic inversion center, is coordinated in a square-planar environment by twotrans-O atoms belonging to two monodentate 5-hydroxyisophthalate (hip) dianions and twotransnicotinamide pyridyl N-donor atoms from monodentate protonated pendantN-(pyridin-4-yl)nicotinamide (4-pnaH) ligands. The protonated 4-pyridylamine groups engage in N—H+...O−hydrogen-bond donation to unligated hip O atoms to construct supramolecular chain motifs parallel to [100]. Water molecules of crystallization, situated between the chains, engage in O—H...O hydrogen bonding to form supramolecular layers and the overall three-dimensional network structure.

scholarly journals Crystal structure of tris(trans-1,2-diaminocyclohexane-κ2N,N′)cobalt(III) trichloride monohydrate

2016 ◽  
Vol 72 (1) ◽  
pp. 49-52
Author(s):  
Megan K. Gallagher ◽  
Allen G. Oliver ◽  
A. Graham Lappin
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Outer Sphere ◽  
Complex Salt ◽  
Coordination Complexes ◽  
Water Molecules ◽  
Rotation Symmetry ◽  
Space Group ◽  
Solvent Water ◽  
Counter Ions

The synthesis of the title hydrated complex salt, [Co(C6H14N2)3]Cl3·H2O, from racemictrans-1,2-diaminocyclohexane and [CoCl(NH3)5]Cl2and its structural characterization are presented in this paper. The product was synthesized in the interest of understanding the hydrogen-bonding patterns of coordination complexes. Previous characterizations of the product in theI-42dspace group have not yielded coordinates; thus, this paper provides the first coordinates for this complex in this space group. The octahedrally coordinated cation adopts twofold rotation symmetry, with outer-sphere chloride counter-ions and solvent water molecules forming a hydrogen-bonded network with amine H atoms.

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