scholarly journals Synthesis of a Hexameric Magnesium 4-pyridyl Complex with Cyclohexane-like Ring Structure via Reductive C-N Activation

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7214
Author(s):  
Samuel R. Lawrence ◽  
Matthew de Vere-Tucker ◽  
Alexandra M. Z. Slawin ◽  
Andreas Stasch
Keyword(s):  
Title Compound ◽  
Elevated Temperatures ◽  
Ring Structure ◽  
Reductive Cleavage ◽  
Bridging Ligands ◽  
Ring Systems

The reaction of [{(Arnacnac)Mg}2] (Arnacnac = HC{MeC(NAr)}2, Ar = 2,6-diisopropylphenyl, Dip, or 2,6-diethylphenyl, Dep) with 4-dimethylaminopyridine (DMAP) at elevated temperatures afforded the hexameric magnesium 4-pyridyl complex [{(Arnacnac)Mg(4-C5H4N)}6] via reductive cleavage of the DMAP C-N bond. The title compound contains a large s-block organometallic cyclohexane-like ring structure comprising tetrahedral (Arnacnac)Mg nodes and linked by linear 4-pyridyl bridging ligands, and the structure is compared with other ring systems. [(Dipnacnac)Mg(DMAP)(NMe2)] was structurally characterised as a by-product.

scholarly journals Poly[μ2-aqua-bis[μ4-2-(1H-1,2,3-benzotriazol-1-yl)acetato]dipotassium]

2012 ◽  
Vol 68 (4) ◽  
pp. m379-m379 ◽  
Author(s):  
Qiong Liu
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Rotation Axis ◽  
Aqua Ligand ◽  
Octahedral Geometry ◽  
Two Dimensional ◽  
Compound K ◽  
Bridging Ligands ◽  
Carboxylate Groups

In the title compound, [K2(C8H6N3O2)2(H2O)]n, each K+ion is seven-coordinated by one O atom from a bridging water molecule, five carboxylate O atoms and one N atom from a benzotriazole group, forming a distorted mono-capped octahedral geometry. In the crystal, the carboxylate groups act as bridging ligands, forming a two-dimensional polymer parallel to (001). The aqua ligand, which lies on a twofold rotation axis, forms intermolecular O—H...O hydrogen bonds within these layers.

scholarly journals Poly[[tetramethanolbis[4-oxo-3-(pyridin-4-yl)-1-(2,4,6-trichlorophenyl)-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-olato]disodium]–diethyl ether–methanol (1/1/2)]

IUCrData ◽  
2016 ◽  
Vol 1 (7) ◽  
Author(s):  
Bassam Abu Thaher ◽  
Dieter Schollmeyer ◽  
Stefan Laufer
Keyword(s):  
Diethyl Ether ◽  
Title Compound ◽  
Pyridine Ring ◽  
Heterocyclic Ring ◽  
Sodium Ion ◽  
Dihedral Angles ◽  
Ring Systems ◽  
Octahedral Environment

In the title compound, [Na2(C16H7Cl3N5O2)2(CH3OH)4]·C4H10O·2CH3OH, the central pyrazolo[3,4-d]pyrimidine system makes dihedral angles of 82.98 (7)° with the trichlorophenyl ring and 13.11 (15)° with the pyridine ring. The sodium ion has an octahedral environment, being coordinated by four methanol molecules and one O and one N atom of two different heterocyclic ring systems.

scholarly journals Diethyl 3,3′-[(3-fluorophenyl)methylene]bis(1H-indole-2-carboxylate)

IUCrData ◽  
2020 ◽  
Vol 5 (7) ◽  
Author(s):  
Hong Jiang ◽  
Yu-Long Li ◽  
Jin Zhou ◽  
Hong-Shun Sun ◽  
Qing-Yu Zhang ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Indole Ring ◽  
Ring Systems ◽  
Compound C ◽  
The Mean ◽  
Supramolecular Chains

In the title compound, C29H25FN2O4, the mean planes of the indole ring systems are approximately perpendicular to one another [dihedral angle = 88.3 (4)°]. The benzene ring is twisted with respect to the indole ring systems by 49.8 (5) and 77.6 (3)°. In the crystal, pairs of N—H...O hydrogen bonds link the molecules into the inversion dimers which are further linked into supramolecular chains propagating along the [110] direction.

scholarly journals Crystal structure of dimethyl 3,3′-[(4-fluorophenyl)methylene]bis(1H-indole-2-carboxylate)

2015 ◽  
Vol 71 (10) ◽  
pp. 1140-1142 ◽  
Author(s):  
Hong-Shun Sun ◽  
Yu-long Li ◽  
Hong Jiang ◽  
Ning Xu ◽  
Hong Xu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Indole Ring ◽  
Ring Systems ◽  
Π Interactions ◽  
Compound C ◽  
The Mean ◽  
Supramolecular Chains

In the title compound, C27H21FN2O4, the mean planes of the indole ring systems (r.m.s. deviations = 0.0263 and 0.0160 Å) are approximately perpendicular to one another, making a dihedral angle of 84.0 (5)°; the fluorobenzene ring is twisted with respect to the mean planes of the two indole ring systems at 89.5 (5) and 84.6 (3)°. In the crystal, pairs of N—H...O hydrogen bonds link the molecules into inversion dimers, which are further linked by N—H...O hydrogen bonds into supramolecular chains propagated along theb-axis direction. Weak C—H...π interactions are observed between neighbouring chains.

scholarly journals 5-(4-Fluorophenyl)-2-(4-methylphenyl)-3-methylsulfanyl-1-benzofuran

2014 ◽  
Vol 70 (3) ◽  
pp. o258-o258
Author(s):  
Hong Dae Choi ◽  
Pil Ja Seo ◽  
Uk Lee
Keyword(s):  
Title Compound ◽  
Three Dimensional ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Ring Systems ◽  
Π Interactions ◽  
Compound C ◽  
Dimensional Network ◽  
Independent Molecules

The asymmetric unit of the title compound, C22H17FOS, contains two independent molecules (AandB). The dihedral angles between the benzofuran ring systems [r.m.s. deviations of 0.026 (1), 0.004 (1) and 0.003 (1) Å, respectively, for moleculeA, and 0.002 (1), 0.004 (1) and 0.005 (1) Å forB] and the pendant 4-fluorophenyl and 4-methylphenyl rings are 39.48 (4) and 30.86 (5)°, respectively, for moleculeA, and 33.34 (6) and 20.99 (8)° forB. In the crystal, molecules are linked by weak C—H...F and C—H...π interactions, resulting in a three-dimensional network.

Structure of [(CH3)2NH2]2CoCl4 at elevated temperatures

1999 ◽  
Vol 55 (5) ◽  
pp. 752-757 ◽  
Author(s):  
Amir H. Mahmoudkhani ◽  
Vratislav Langer
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Phase Transitions ◽  
Physical Properties ◽  
Electric Conductivity ◽  
Title Compound ◽  
Structural Changes ◽  
Elevated Temperatures ◽  
The Other ◽  
Cell Parameters

The crystal structure of the title compound, dimethylammonium tetrachlorocobaltate(II), has been determined at four temperatures between 297 and 366 K, in order to investigate possible phase transitions at 313 and 353 K [Kapustianik, Polovinko & Kaluza et al. (1996). Phys. Status Solidi A, 153, 117–122]. We found that there is no significant change either in the hydrogen-bonding network or in the cell parameters, apart from a linear dilatation with temperature. This study reveals that the anomalous variation in electric conductivity and some of the other physical properties of the compound cannot be explained by structural changes.

Di-μ-2-sulfonatobenzoato-bis[aqua(1,10-phenanthroline)copper(II)] trihydrate

2006 ◽  
Vol 62 (4) ◽  
pp. m875-m877
Author(s):  
Wei-Bing Zhang ◽  
Shuang-Di Ruan ◽  
Shu-Juan Zhu ◽  
Hong-Ping Xiao ◽  
Sai-Ya Ye
Keyword(s):  
Hydrogen Bond ◽  
Network Structure ◽  
Title Compound ◽  
Intermolecular Hydrogen Bond ◽  
Two Dimensional ◽  
Bridging Ligands ◽  
Pyramidal Geometry ◽  
Hydrogen Bond Interactions ◽  
Dimensional Network ◽  
Square Pyramidal Geometry

In the title compound, [Cu2(C7H4O5S)2(C12H8N2)2(H2O)2]·3H2O, each copper(II) atom is coordinated by two N atoms from one 1,10-phenanthroline molecule, two carboxylate O atoms from two 2-sulfonatobenzoato dianions and one aqua O atom in a distorted square pyramidal geometry. The 2-sulfonatobenzoato dianions function as μ2-bridging ligands in the formation of a dinuclear complex. Intermolecular hydrogen-bond interactions link the dinuclear units into a two-dimensional network structure.

scholarly journals 2-(2-Methoxyphenyl)-1H-isoindole-1,3(2H)-dione

2012 ◽  
Vol 68 (8) ◽  
pp. o2589-o2589 ◽  
Author(s):  
M. Nawaz Tahir ◽  
Muhammad Sirajuddin ◽  
Saqib Ali ◽  
Khurram Shahzad Munawar
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring Systems ◽  
Compound C ◽  
Π Stacking

In the title compound, C15H11NO3, the dihedral angle between the methoxybenzene and isoindole ring systems is 70.21 (3)°. The methoxy C atom is close to being coplanar with its attached ring [deviation = 0.133 (2) Å] and is oriented away from the isoindole moiety. In the crystal, inversion dimers linked by pairs of C—H...O hydrogen bonds generateR22(10) loops. Further C—H...O interactions lead to (010) infinite sheets and weak aromatic π–π stacking [centroid–centroid separations = 3.6990 (10) and 3.7217 (10) Å] is also observed.

scholarly journals Bis(1,2-dimethoxyethane)-1κ2O,O′;3κ2O,O′-tetrakis(μ-1,1,1,3,3,3-hexafluoro-2-methylpropan-2-olato)-1:2κ4O:O;2:3κ4O:O-1,3-dilithium-2-magnesium

2012 ◽  
Vol 68 (8) ◽  
pp. m1106-m1106 ◽  
Author(s):  
Klaus Wurst ◽  
Michael R. Buchmeiser
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Rotation Axis ◽  
Ligand Field ◽  
Asymmetric Unit ◽  
Crystalline Powder ◽  
Bridging Ligands ◽  
White Crystalline Powder

The title compound, [Li2Mg(C4H3F6O)4(C4H10O2)2], forms as a white crystalline powder by-product of the reaction of lithium 1,1,1,3,3,3-hexafluoro-2-methyl-2-propoxide with Mo(N-2,6-Me2—C6H3)(CHCMe2Ph)(O3SCF3)2·2DME (DME is 1,2-dimethoxyethane) contaminated with MgCl2. The crystal structure of this compound contains half a molecule in the asymmetric unit, with a twofold rotation axis through the central Mg2+cation. The four 1,1,1,3,3,3-hexafluoro-2-methylpropan-2-olate ligands serve as bridging ligands connecting the Li+and Mg2+cations. The Li+cation is additionally stabilized by a DME ligand. This results in a distorted tetrahedral ligand field around both the Mg2+and Li+cations.

scholarly journals 2-Bromo-1-chlorophenyl-3-(4-methoxyphenyl)prop-2-en-1-one

2006 ◽  
Vol 62 (4) ◽  
pp. o1578-o1579 ◽  
Author(s):  
William T. A. Harrison ◽  
H. S. Yathirajan ◽  
B. K. Sarojini ◽  
B. Narayana ◽  
K. K. Vijaya Raj
Keyword(s):  
Benzene Ring ◽  
Title Compound ◽  
Molecular Conformation ◽  
Crystal Packing ◽  
Geometrical Parameters ◽  
Ring Systems ◽  
Bond Lengths ◽  
Compound C ◽  
Centrosymmetric Structure

The geometrical parameters for the title compound, C16H12BrClO2, are normal. The observed bond lengths and angles imply that there is little electronic conjugation between the two benzene ring systems. An intramolecular C—H...Br interaction may help to establish the molecular conformation. The crystal packing results in a centrosymmetric structure.

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