Two Novel Lithium−15-Crown-5 Complexes:  An Extended LiCl Chain Stabilized by Crown Ether and a Dimeric Complex Stabilized by Hydrogen Bonding with Water

1999 ◽  
Vol 38 (20) ◽  
pp. 4554-4558 ◽  
Author(s):  
Roman Boulatov ◽  
Bin Du ◽  
Edward A. Meyers ◽  
Sheldon G. Shore
Keyword(s):  
Hydrogen Bonding ◽  
Crown Ether ◽  
Dimeric Complex

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.

Interfacial Hydrogen Bonding. Self-Assembly of a Monolayer of a Fullerene−Crown Ether Derivative on Gold Surfaces Derivatized with an Ammonium-Terminated Alkanethiolate

1996 ◽  
Vol 118 (25) ◽  
pp. 6086-6087 ◽  
Author(s):  
Francisco Arias ◽  
Luis A. Godínez ◽  
Stephen R. Wilson ◽  
Angel E. Kaifer ◽  
Luis Echegoyen
Keyword(s):  
Hydrogen Bonding ◽  
Crown Ether ◽  
Self Assembly ◽  
Gold Surfaces ◽  
Ether Derivative

scholarly journals Surface Engineering of Fluoropolymer Films via the Attachment of Crown Ether Derivatives Based on the Combination of Radiation-Induced Graft Polymerization and the Kabachnik–Fields Reaction

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1337 ◽  
Author(s):  
Omichi ◽  
Yamashita ◽  
Okura ◽  
Ikutomo ◽  
Ueki ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Crown Ether ◽  
Crown Ethers ◽  
Graft Polymerization ◽  
Surface Engineering ◽  
Ammonium Cation ◽  
Three Component Reaction ◽  
Radiation Induced ◽  
Fluoropolymer Films

In this manuscript, we present the successful attachment of crown ether moieties onto fluoropolymer surfaces, via the combination of radiation-induced graft polymerization and a subsequent surface Kabachnik–Fields three-component reaction. The obtained crown ether-tethered fluoropolymer films exhibited an ammonium cation capturing ability, owing to the host–guest interactions (i.e., hydrogen bonding) between the surface-anchored crown ethers and the guest ammonium cations.

scholarly journals Self-Organization of -Crown Ether Derivatives into Double-Columnar Arrays Controlled by Supramolecular Isomers of Hydrogen-Bonded Anionic Biimidazolate Ni Complexes

2012 ◽  
Vol 2012 ◽  
pp. 1-10
Author(s):  
Makoto Tadokoro ◽  
Kyosuke Isoda ◽  
Yasuko Tanaka ◽  
Yuko Kaneko ◽  
Syoko Yamamoto ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Crown Ether ◽  
Building Block ◽  
The Other ◽  
Optical Isomer ◽  
Self Organization ◽  
Optical Isomers ◽  
One Dimensional ◽  
Molecular Building Block ◽  
Hydrogen Bonded

Anionic tris (biimidazolate) nickelate (II) ([Ni(Hbim)3]−), which is a hydrogen-bonding (H-bonding) molecular building block, undergoes self-organization into honeycomb-sheet superstructures connected by complementary intermolecular H-bonds. The crystal obtained from the stacking of these sheets is assembled into channel frameworks, approximately 2 nm wide, that clathrate two cationic K+-crown ether derivatives organised into one-dimensional (1D) double-columnar arrays. In this study, we have shown that all five cationic guest-included crystals form nanochannel structures that clathrate the 1-D double-columnar arrays of one of the four types of K+-crown ether derivatives, one of which induces a polymorph. This is accomplished by adaptably fitting two types of anionic [Ni(Hbim)3]−host arrays. One is a network with H-bonded linkages alternating between the two different optical isomers of the and types with flexible H-bonded [Ni(Hbim)3]−. The other is a network of a racemate with 1-D H-bonded arrays of the same optical isomer for each type. Thus, [Ni(Hbim)3]−can assemble large cations such as K+crown-ether derivatives into double-columnar arrays by highly recognizing flexible H-bonding arrangements with two host networks of and .

A halide-free pyridinium-substituted η3-cycloheptatrienide–Pd complex

2017 ◽  
Vol 73 (9) ◽  
pp. 754-759
Author(s):  
C. Jandl ◽  
S. Stegbauer ◽  
A. Pöthig
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Synthesis And Characterization ◽  
Dimeric Complex ◽  
Coordination Sites ◽  
Internal Hydrogen ◽  
Halide Ligands

We report the synthesis and characterization of a novel 4-(dimethylamino)pyridinium-substituted η3-cycloheptatrienide–Pd complex which is free of halide ligands. Diacetonitrile{η3-[4-(dimethylamino)pyridinium-1-yl]cycloheptatrienido}palladium(II) bis(tetrafluoroborate), [Pd(C2H3N)2(C14H16N2)](BF4)2, was prepared by the exchange of two bromide ligands for noncoordinating anions, which results in the empty coordination sites being occupied by acetonitrile ligands. As described previously, exchange of only one bromide leads to a dimeric complex, di-μ-bromido-bis({η3-[4-(dimethylamino)pyridinium-1-yl]cycloheptatrienido}palladium(II)) bis(tetrafluoroborate) acetonitrile disolvate, [Pd2Br2(C14H16N2)2](BF4)2·2CH3CN, with bridging bromide ligands, and the crystal structure of this compound is also reported here. The structures of the cycloheptatrienide ligands of both complexes are analogous to the dibromide derivative, showing the allyl bond in the β-position with respect to the pyridinium substituent. This indicates that, unlike a previous interpretation, the main reason for the formation of the β-isomer cannot be internal hydrogen bonding between the cationic substituents and bromide ligands.

Synthesis and Crystal Structure of a Caesium Hydrogen Benzoylcyanoximate Complex with 18-Crown-6: Cs(18-Crown-6){H(L)2}

1997 ◽  
Vol 52 (8) ◽  
pp. 901-905 ◽  
Author(s):  
Vera V Ponomareva ◽  
Victor V Skopenko ◽  
Konstantin V Domasevitch ◽  
Joachim Sieler ◽  
Thomas Gelbrich
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Crown Ether ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
The Mean ◽  
Cyano Groups ◽  
Oxygen Atoms

Abstract The caesium hydrogen benzoylcyanoximate (L-) complex with 18-crown-6 of composition Cs(18-crown-6){H(L)2} has been prepared and studied by means of X-ray diffraction [monoclinic, space group P21/n, with a = 9.906(1), b = 18.387(3), c = 18.855(3)Å, β = 90.13(1)°, V = 3434.3(9) Å, Z = 4; final R1 = 0.043 for the 6431 independent reflections used. The lattice consists of Cs(18-crown-6)+ cations and complex hydrogen oximate anions {H(L)2}-, formed via strong hydrogen bonding between the oxygen atoms of nitroso-groups [O - - - O ca. 2.456(5)Å]. The caesium atom deviates by 1.492(3) Å from the mean plane of the oxygen atoms of the macrocyclic ether (dominant orientation of disordered ligand, 60%) and adopts a typical “sunrise coordination” [Cs-O (ether) 3.040(9)-3.312(7) Å]. The hydrogen oximate groups are bonded to the metal center only on one side of the crown ether plane via the oxygen atoms of nitroso-groups and the nitrogen atoms of cyano groups (Cs-O ca. 3.040(9), 3.312(7) Å; Cs-N ca. 3.469(5), 3.679(6) Å). The coordination polyhedron of Cs+ can be described as a distorted bicapped tetragonal prism.

A linear supramolecular array of {[Mn(H2O)2(15-crown-5)]Br2}n

2000 ◽  
Vol 57 (1) ◽  
pp. m3-m4 ◽  
Author(s):  
Howard O. N. Reid ◽  
Ishenkumba A. Kahwa ◽  
Joel T. Mague ◽  
Gary L. McPherson
Keyword(s):  
Hydrogen Bonding ◽  
Crown Ether ◽  
Metal Ion ◽  
Water Molecules ◽  
Counter Ions

Diaqua(1,4,7,10,14-pentaoxacyclopentadecane)manganese(II) dibromide, [Mn(C10H20O5)(H2O)2]Br2, prepared in a search for emissive MnIIions in unusual coordination environments, contains the metal ion encircled by the crown ether ligand, with the water molecules intransaxial positions. Hydrogen bonding between these and the Br−counter-ions forms chains of cations running approximately parallel toa.

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