X-Ray diffraction study of liquid n-butane at 140 and 267 K

X-ray diffraction data for liquid n-butane near the triple and boiling points are presented. The data are analyzed using scattering factors for −CH3 and −CH2 groups which permits extraction of structure and distribution functions for carbon sites. An intramolecular carbon–carbon distance at approxim...

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Bibliographic Details
Published in:The Journal of chemical physics 1989-10, Vol.91 (7), p.4299-4306
Main Authors: HABENSCHUSS, A, NARTEN, A. H
Format: Article
Language:English
Subjects:
400201 - Chemical & Physicochemical Properties
ALKANES
BOILING POINTS
BUTANE
COHERENT SCATTERING
Condensed matter: structure, mechanical and thermal properties
DIFFRACTION
DISTRIBUTION FUNCTIONS
Exact sciences and technology
FLUIDS
FUNCTIONS
HYDROCARBONS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
LIQUIDS
LOW TEMPERATURE
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
Physics
SCATTERING
STRUCTURE FACTORS
Structure of solids and liquids
crystallography
Studies of specific liquid structures
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TRIPLE POINT
X-RAY DIFFRACTION
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Summary:X-ray diffraction data for liquid n-butane near the triple and boiling points are presented. The data are analyzed using scattering factors for −CH3 and −CH2 groups which permits extraction of structure and distribution functions for carbon sites. An intramolecular carbon–carbon distance at approximately 3.1 Å is assigned to a short end-to-end distance in a near-gauche conformation, which is in agreement with the electron diffraction results for gaseous n-butane. The intermolecular pair distribution functions show a large difference in the liquid structure for the low and high temperature states, similar to that found in liquid propane.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.456810