Infrared spectra of the clathrate hydrates of acetylene and of acetylene/acetone
Journal Article
·
· J. Phys. Chem.; (United States)
The Structure I clathrates C/sub 2/D/sub 2/-5.75 H/sub 2/O and C/sub 2/H/sub 2/-5.75D/sub 2/O and Structure II clathrates 2C/sub 2/D/sub 2/-acetone-17H/sub 2/O and 2C/sub 2/H/sub 2/-acetone-17D/sub 2/O were formed by condensing the stoichiometric mixtures on a CsI substrate at 15 K followed by annealing to 180 K in the presence of about 20 Torr of acetylene. This preparative method gives samples with relatively sharp and reproducible infrared spectra that distinguish the spectra of acetylene guest molecules in the two types of Structure I cages. The frequencies and temperature-dependent bandwidths indicate that the guest molecules do not rotate freely in the cages but, instead, librate about fixed orientations. These fixed orientations do not involve hydrogen bond interactions; they may place the acetylene molecular axes pointed at cage windows.
- Research Organization:
- Lawrence Berkeley Lab., CA
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6970228
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:2; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ACETONE
ACETYLENE
ALKALI METAL COMPOUNDS
ALKYNES
CESIUM COMPOUNDS
CESIUM IODIDES
CHEMICAL BONDS
CLATHRATES
DATA
DEUTERIUM COMPOUNDS
ELEMENTS
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HYDRATES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
INFRARED SPECTRA
INORGANIC PHOSPHORS
IODIDES
IODINE COMPOUNDS
KETONES
LOW TEMPERATURE
MATRIX ISOLATION
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOSPHORS
SPECTRA
SPECTROSCOPY
VERY LOW TEMPERATURE
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ACETONE
ACETYLENE
ALKALI METAL COMPOUNDS
ALKYNES
CESIUM COMPOUNDS
CESIUM IODIDES
CHEMICAL BONDS
CLATHRATES
DATA
DEUTERIUM COMPOUNDS
ELEMENTS
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HYDRATES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
INFORMATION
INFRARED SPECTRA
INORGANIC PHOSPHORS
IODIDES
IODINE COMPOUNDS
KETONES
LOW TEMPERATURE
MATRIX ISOLATION
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOSPHORS
SPECTRA
SPECTROSCOPY
VERY LOW TEMPERATURE