Dielectric properties of some components of fruit aroma in carbon tetrachloride solution at 298.15 K.
The static electric permittivity and refractive index of carbon tetrachloride solutions of ethyl-2-methyl butanoate, 3-hexene-l-ol, 2-hexenal, ethyldecanoate, methyl anthranilate, anethole, damascenone and isoamyl propanoate were measured at 298.15 K in the concentration range up to 4.0 mol dm-3. The molar polarizations and refractions of the solutions, the partial molar polarizations and refractions of the solutes, as well as the dipole moments at infinite dilution of the solutes were calculated. On the basis of the concentration dependence of apparent values of the square of the molecular dipole moment, it was established that for the systems studied oligomeric species with low dipole moment were prevalent. With the assumption that the dipole moment of dimeric species amounts to zero (except for 3-hexene-l-ol and methyl anthranilate), the constant of dimerization was calculated and a weak molecular association was deduced.
Rudan-Tasic
D
D
Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
Jurca
S
S
Klofutar
C
C
D000465:Algorithms; D002251:Carbon Tetrachloride / Q000737:chemistry*; D004563:Electrochemistry; D005638:Fruit / Q000737:chemistry*; D009812:Odorants / Q000032:analysis*; D012031:Refractometry; D012996:Solutions; D012997:Solvents
D012996:Solutions; D012997:Solvents; D002251:Carbon Tetrachloride