Perfluoro-n-alkyl halides

The examples in Table 6.1 indicate how the CF2 chemical shifts vary for typical examples of perfluoro-n-alkyl halides. 

TABLE 6.1. Fluorine 6-Values for Perfluoro-n-Alkyl Halides... 

Further (c/. Vol. 1, p. 89) Russian work on fluoroalkenylcarbaboranes has been reported (see p. 60), fluoroalkylborates have been synthesized via reaction of hexafluoroacetone and related ketones with boron halides, organoboron halides, or alkylthioboranes (see p. 257), and from perfluoro-alkyl hypochlorites (see p. 264), CFj-S—B compounds have been prepared (see p. 270), and conductivity studies on the complex acid HBfOaC CFj) and its caesium salt have been described. Attempts to isolate the tristri-fluoroacetate B(02C CF3)a from products of the reaction systems B(OH)3-(CFs CO) , BCl3-(CF9 CO)jO-n-pentane, and BCl3-CF3-C02H-n-pentane have yielded only I(CF3 C0s)2B]20 or [(CF3 C02)2B]30-B(02C CF3)3 mixtures (c/. ref. 58). 

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