Table 1
Experimental dipole moment components μi (D) of ethanola with proposed signs.
| Component | Valuea | Signb | ||
|
|
||||
| Initial | Present | |||
|
|
||||
| μa(a ↔ a) | 0.046 (14) | + | (+) | |
| μb(a ↔ a) | 1.438 (7) | + | + | |
| μc(a ↔ a) | 0.c | |||
| μa(g± ↔ g±) | 1.246 (10) | − | + | |
| μb(g± ↔ g±) | 0.104 (8) | + | (+) | |
| μc(g± ↔ g∓) | 1.101 (16) | − | − | |
Notes.
From Takano et al. (1968) and Kakar & Quade (1980) for anti and gauche conformers of ethanol, respectively. Numbers in parentheses after the values refer to the reported uncertainties in units of the least significant figures. a, g+, and g− refer to the anti and to the symmetric and antisymmetric states of the gauche conformers of ethanol, respectively.
With respect to the signs of the interaction parameters in the Hamiltonian model from Pearson et al. (2008). Initial values are from that work. Signs in parentheses are not certain. See also the second to last paragraph in Sect. 2.
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