Infrared spectra of hydrogen bonded organic molecules in the solid state: Width of OH stretching and librational modes in acetic acid

1978 ◽  
Vol 28 (1-2) ◽  
pp. 55-72 ◽  
Author(s):  
Paolo Teragni ◽  
Giorgio Masetti ◽  
Giuseppe Zerbi
Keyword(s):  
Acetic Acid ◽  
Solid State ◽  
Infrared Spectra ◽  
Organic Molecules ◽  
Hydrogen Bonded

Infrared Spectra of Crystalline Acetic Acid, a Hydrogen-Bonded Polymer

1977 ◽  
Vol 31 (2) ◽  
pp. 110-115 ◽  
Author(s):  
P. F. Krause ◽  
J. E. Katon ◽  
J. M. Rogers ◽  
D. B. Phillips
Keyword(s):  
Hydrogen Bonding ◽  
Acetic Acid ◽  
Infrared Spectra ◽  
Group Analysis ◽  
Structural Models ◽  
Factor Group ◽  
Vibrational Modes ◽  
Cryogenic Temperatures ◽  
Polymeric Chains ◽  
Hydrogen Bonded

The polarized infrared spectra of crystalline acetic acid and two of its deuterated derivatives, CH3COOD and CD3COOD, have been recorded from 400 to 4000 cm−1 at cryogenic temperatures. The spectroscopic results have been interpreted on the basis of a factor group analysis based on two structural models: a crystallographic cell composed of four interacting monomer units some of whose vibrational modes are highly perturbed by hydrogen bonding and a unit cell composed of two noninteracting acetic acid chains. The results are discussed in terms of possible interactions between the hydrogen-bonded acetic acid polymeric chains.

Correlation of Mössbauer Quadrupole Splitting (ΔΕQ) and Infrared Cyanide Frequency Separation in Alkali Metal Ferricyanides

1975 ◽  
Vol 30 (1-2) ◽  
pp. 96-98 ◽  
Author(s):  
A. N. Garg
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Quadrupole Splitting ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Frequency Separation ◽  
Hydrogen Atoms ◽  
Stretching Vibrations ◽  
Hydrogen Bonded

Mössbauer and infrared spectra of the alkali metal ferricyanides M3I [Fe(CN)6] · nH2O, where MI = H, Li and Na were studied at room temperature. All the three compounds displayed a doublet with small quadrupole splitting (ΔΕQ). Infrared spectra of these compounds in solid state gave two frequencies for C=N stretching vibrations with their separation (Δv) in increasing order which was found to be linearly correlated with ΔE Q. A plausible explanation has been given in terms of the interaction of Li+ and Na+ cations with the CN- ligands of octahedrally symmetric ferricyanide anion [Fe(CN)6]3- similar to that of hydrogen atoms which are hydrogen bonded in H3Fe(CN)6.

scholarly journals Infrared spectra of complex organic molecules in astronomically relevant ice matrices

2019 ◽  
Vol 15 (S350) ◽  
pp. 356-357
Author(s):  
J. Terwisscha van Scheltinga ◽  
N. F. W. Ligterink ◽  
A. C. A. Boogert ◽  
E. F. van Dishoeck ◽  
H. Linnartz
Keyword(s):  
Solid State ◽  
Gas Phase ◽  
Infrared Spectra ◽  
Organic Molecules ◽  
Laboratory Studies ◽  
Astronomical Observations ◽  
James Webb Space Telescope ◽  
Circumstellar Gas ◽  
Complex Organic ◽  
Recent Laboratory

AbstractThe identification of complex organic molecules, COMs, in inter- and circumstellar gas phase environments is steadily increasing. The formation of such COMs takes largely place on the icy dust grains, as has been shown in recent laboratory studies. Until now solid state features of smaller molecular species have been directly identified in these environments. The presented work on acetaldehyde (CH3CHO), ethanol (CH3CH2OH), and dimethyl ether (CH3OCH3) in different astronomically relevant ice environments and for temperatures in the range 15 to 160 Kelvin, provides the necessary tools to guide or interpret astronomical observations, specifically for upcoming James Webb Space Telescope observations.

Isolation and Structure of a Hydrogen-bonded 2,2′:6′,2′′-Terpyridin-4′-one Acetic Acid Adduct

2014 ◽  
Vol 67 (4) ◽  
pp. 651 ◽  
Author(s):  
Pas Florio ◽  
Campbell J. Coghlan ◽  
Chih-Pei Lin ◽  
Kei Saito ◽  
Eva M. Campi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Solid State ◽  
Ammonium Acetate ◽  
Condensation Reaction ◽  
Acetate Salt ◽  
Pyridine Nitrogen ◽  
Acid Adduct ◽  
Hydrogen Bonded

Herein, we report the crystal structure of a key intermediate in the synthesis of 4′-substituted-terpyridines. Our findings confirm that the terpyridin-4′-one intermediate as generated from the condensation reaction of the corresponding triketone precursor with ammonium acetate is isolated as a hydrogen-bonded adduct with acetic acid, and not, as previously reported, as the acetate salt of a protonated pyridine nitrogen. This finding provides a rationale for the behaviour and structure of substituted terpyridin-4′-ones and pyridones in both the solid state and in solution.

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