1,8-Bis(phenylethynyl)anthracene – gas and solid phase structures

2015 ◽  
Vol 13 (33) ◽  
pp. 8893-8905 ◽  
Author(s):  
Jan-Hendrik Lamm ◽  
Jan Horstmann ◽  
Hans-Georg Stammler ◽  
Norbert W. Mitzel ◽  
Yuriy A. Zhabanov ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Gas Phase ◽  
Solid Phase ◽  
Phase Structures

The structure of 1,8-bis(phenylethynyl)anthracene has been studied in detail in the gas phase and the solid state by a combined GED/MS method and by XRD of a single crystal. Aryl⋯aryl interactions are discussed in terms of dispersive forces.

Ring inversion in solid fluorocyclohexane

1986 ◽  
Vol 64 (10) ◽  
pp. 2094-2095 ◽  
Author(s):  
Roderick E. Wasylishen
Keyword(s):  
Solid State ◽  
Gas Phase ◽  
Solid Phase ◽  
Ring System ◽  
Cyclohexane Ring ◽  
Ring Inversion ◽  
Nmr Study

Inversion of the cyclohexane ring system in the solid state has been directly observed in a 19F nmr study of solid fluorocyclohexane. The barrier to ring inversion in the orientationally disordered solid phase, ΔG≠e→a = 44.1 ± 0.9 kJ mol−1 at 263 K is found to be only slightly larger than the value previously reported for a CFCl3 solution of fluorocyclohexane. The population of the equatorial conformation is slightly favored over the axial conformation with K = Pe/Pa = 1.56 at 281 K; similar values have been obtained in CFCl3 and in the gas phase.

Zur Chemie des 1-Aza-2-bora-3-oxacyclopentansystems / The Chemistry of the 1-Aza-2-bora-3-oxacyclopentane System

1980 ◽  
Vol 35 (4) ◽  
pp. 447-453 ◽  
Author(s):  
Heinz-Gerhard Köhn ◽  
Anton Melier
Keyword(s):  
Solid State ◽  
Gas Phase ◽  
Solid Phase ◽  
Derivatives Of

Derivatives of 1-aza-2-bora-3-oxacyclopentane are easily prepared by cleavage of the N-Si and O-Si bonds in disilylated ethanolamines with halogenoboranes. The B-halogeno and B-hydro compounds with NH and N-CH3 moieties are associated in the solid state, and in part also in the liquid and gas phase. In the solid phase hexahydroborazine derivatives are formed by association. Further compounds include B-N-Si-substituted rings and interlinked bicyclic systems.

scholarly journals Bleaching the Record: After 200 Years, Single Crystal X-Ray Crystallography Reveals the Structure and Hydrogen-Bonding Properties of Hypochlorite and Hypobromite Ions in the Solid State

2021 ◽  
Author(s):  
Filip Topic ◽  
Joseph Marrett ◽  
Tristan Borchers ◽  
Hatem M. Titi ◽  
Christopher J. Barrett ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Gas Phase ◽  
X Ray ◽  
X Ray Crystallography ◽  
Single Crystal Structures ◽  
Hypohalous Acids ◽  
Bonding Properties ◽  
Insight Into

<div>We report the first single crystal structures of hypochlorite and hypobromite salts, including hydrated sodium hypochlorite - a ubiquitous bleaching and disinfection agent in use for almost 200 years. The structures represent the first characterization of fundamentally important hypochlorite and hypobromite anions in the solid state, by X-ray crystallography and are supported by Raman spectroscopy on individual crystals. The structural analysis provides insight into supramolecular chemistry of the hypohalite ions in the hydrated environment of the NaOCl<sup>.</sup>5H<sub>2</sub>O and NaOBr<sup>.</sup>5H<sub>2</sub>O solid salts, and reveals measured Cl-O and Br-O bond lengths of 1.69 A and 1.82 A, respectively, which are significantly longer than those for corresponding higher-valence oxoanions, and in agreement with the values spectroscopically determined for hypohalous acids and corresponding oxides in the gas phase.<br></div>

Molybdates Solid State Synthesis: The MgO—MoO3 System

1980 ◽  
Vol 35 (5) ◽  
pp. 500-502 ◽  
Author(s):  
V. Massarotti ◽  
G. Flor ◽  
A. Marini ◽  
R. Riccardi
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Transport Properties ◽  
Gas Phase ◽  
Intermediate Compound ◽  
Solid State Synthesis ◽  
The Other ◽  
Formation Reaction ◽  
Temperature Range

Abstract The formation reaction of Mg2Mo3O11 from MgO (single crystal) and MoO3 (pellet) has been investigated in the temperature range 873-973 K.Supported by an analysis of the transport properties a mechanism is proposed involving a unidirectional transport of Mo6+ via V6′Mo and of oxygen via gas phase.The transport properties of MgMoO4 (the other intermediate compound in the system MgO-MoO3) were also studied and the results were found to agree with the mechanism observed in a previous work on the basis of kinetic and structural considerations.

A multinuclear solid-state magnetic resonance study of silver nitrate triphenylphosphine

2005 ◽  
Vol 83 (10) ◽  
pp. 1721-1730 ◽  
Author(s):  
Se-Woung Oh ◽  
Guy M Bernard ◽  
Roderick E Wasylishen ◽  
Robert McDonald ◽  
Michael J Ferguson
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Single Crystal ◽  
Silver Nitrate ◽  
Solid Phase ◽  
Variable Temperature ◽  
Spin Coupling ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr

Variable-temperature solid-state 31P, 15N, and 2H NMR spectroscopy, X-ray diffraction, and differential scanning calorimetry studies of the 1:1 adduct of silver nitrate and triphenylphosphine (AgNO3·PPh3) reveal a solid–solid phase transition at 300 K. The principal components of the phosphorus and nitrogen chemical shift tensors for both phases are determined from NMR spectra of MAS and stationary samples. In addition, the indirect spin-spin coupling between phosphorus and the naturally occurring isotopes of silver (107Ag and 109Ag) are resolved. Experimental 2H NMR line shapes for silver nitrate perdeuterated triphenylphosphine are those characteristic of rigid phenyl groups at temperatures above and below the phase-transition temperature. Powder and single-crystal X-ray diffraction data for AgNO3·PPh3 obtained at 193, 295, and 313 K are reported; data obtained at 193 and 295 K are almost identical, but are significantly different from those obtained at 313 K and from an earlier single-crystal X-ray diffraction investigation performed at 298 K. All X-ray studies found that AgNO3·PPh3 crystallizes in the monoclinic form, space group P21/c.Key words: 1:1 silver nitrate triphenylphosphine adduct, solid-state NMR, X-ray diffraction, phase transition.

scholarly journals Bleaching the Record: After 200 Years, Single Crystal X-Ray Crystallography Reveals the Structure and Hydrogen-Bonding Properties of Hypochlorite and Hypobromite Ions in the Solid State

2021 ◽  
Author(s):  
Filip Topic ◽  
Joseph Marrett ◽  
Tristan Borchers ◽  
Hatem M. Titi ◽  
Christopher J. Barrett ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Gas Phase ◽  
X Ray ◽  
X Ray Crystallography ◽  
Single Crystal Structures ◽  
Hypohalous Acids ◽  
Bonding Properties ◽  
Insight Into

<div>We report the first single crystal structures of hypochlorite and hypobromite salts, including hydrated sodium hypochlorite - a ubiquitous bleaching and disinfection agent in use for almost 200 years. The structures represent the first characterization of fundamentally important hypochlorite and hypobromite anions in the solid state, by X-ray crystallography and are supported by Raman spectroscopy on individual crystals. The structural analysis provides insight into supramolecular chemistry of the hypohalite ions in the hydrated environment of the NaOCl<sup>.</sup>5H<sub>2</sub>O and NaOBr<sup>.</sup>5H<sub>2</sub>O solid salts, and reveals measured Cl-O and Br-O bond lengths of 1.69 A and 1.82 A, respectively, which are significantly longer than those for corresponding higher-valence oxoanions, and in agreement with the values spectroscopically determined for hypohalous acids and corresponding oxides in the gas phase.<br></div>

scholarly journals Solid‐State and Gas‐Phase Structures and Energetic Properties of the Dangerous Methyl and Fluoromethyl Nitrates

2019 ◽  
Vol 58 (51) ◽  
pp. 18557-18561 ◽  
Author(s):  
Marco Reichel ◽  
Burkhard Krumm ◽  
Yury V. Vishnevskiy ◽  
Sebastian Blomeyer ◽  
Jan Schwabedissen ◽  
...  
Keyword(s):  
Solid State ◽  
Gas Phase ◽  
Energetic Properties ◽  
Phase Structures

Approaching the Gas-Phase Structures of [AgS8]+ and [AgS16]+ in the Solid State

2002 ◽  
Vol 8 (15) ◽  
pp. 3386-3401 ◽  
Author(s):  
T. Stanley Cameron ◽  
Andreas Decken ◽  
Isabelle Dionne ◽  
Min Fang ◽  
Ingo Krossing ◽  
...  
Keyword(s):  
Solid State ◽  
Gas Phase ◽  
Phase Structures
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