In:
The Journal of Chemical Physics, AIP Publishing, Vol. 62, No. 8 ( 1975-04-15), p. 3230-3234
Abstract:
The broad band absorption of polar liquids of the substituted methane and mono-substituted benzene type have been examined in the far infrared region. Their integrated absorption intensity (Aobs) has been determined, and the plot of this against the square of the dipole moment (μ) divided by the average moment of inertia yields a straight line for both the symmetric-top and phenyl-Z molecules examined although their slopes differ. For the eight symmetric-top molecules by far the major part of the absorption may be accounted for by a rotational contribution to the integrated absorption (Al). For both types of molecules the internal field effects appear not to be of prime importance in influencing the Al/Aobs ratio and give some support to the view of Rothschild that the rotational motion in liquids is not very sensitive to molecular (dipole) association, providing momer species are maintained. In general, the liquids obey the relationship αmax = 0.403 μ2/Iav + 2.5, where αmax is the maximum value of the absorption coefficient. The use of this relationship in indicating strong association—polymerized units— is discussed as also its application in estimating the average moment of inertia.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
1975
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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