No abstract

The dielectric spectra of the following liquid mixture systems have been measured over the whole absorption region: Glycerol (Gly)/n-butanol, Glylr-butanol (both at 20°C) and Gly/guaiacol(20,40 and 60 " C ) . Thc results are comparatively discussed with regard to hetero-interactions, taking into consideration the possibility of internal hydrogen bonding in the case of guaiacol and. generally. of steric constraints.

The preparation of 4,4,4-Trichloro-J 2 -l-butenyl-dichlorophosphate and -dichlorophosphite from the corresponding P(V) and P(III) compounds is described.

Dielectric spectra have been measured up to 72 GHz at 20°C for solutions of /3-cyclodextrin (CD) in the following solvents over the whole solubility range of CD: dimethylsulfoxide (DMSO), DMSO/ I,4-dioxane mixture (2:1 molar ratio), DMSO/water mixtures (2:1 and 1:2). The spectra are analyzed into a sum of Debye type spectral components. These are likely to be caused by different physical processes. The discussion shows (i) that there is a preferential CD-DMSO interaction, by far exceeding the CD-water interaction, and (») that, concerning CD-DMSO, a loose interaction can be distinguished from the formation of an inclusion complex.