Preparation and Variables

Many variables are involved in the activation process of a carbon by a hydroxide. A knowledge of their importance will allow us to control them and hence to improve the process in terms of both the yield and the characteristics of the ACs prepared (i.e., adsorption capacity and MPSD). 

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Details have appeared of the preparation and variable-temperature n.m.r. of the difluorophosphoranes (27), (29), and (30).29 Only with (27) was the conformer (28), with a diequatorial four-membered ring, detected at low temperatures. Interconversion of the cis- and trans-isomers of (30) was slow on the n.m.r. time-scale at —90 °C. 

Details have appeared of the preparation and variable-temperature F n.m.r. spectra of the phosphetan-hexafluoroacetone adducts (18). The trans-dimethylaminophosphorane (18 R = Me2N) on dissolving in hexa-fluoropropan-2-ol gave the hexafluoroisopropox3q)hosphorane [18 ... 

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