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Replacement of hydrogen by fluorine in a variety of organic compounds is accomplished with high efficiency in liquid hydrogen fluoride (aHF), at or below 20 "C, using the thermodynamically unstable fluorides RNiF3 and NiF4, the latter prepared in situ from K2NiF6 with BF3.Fluorocarbon compounds can often be derived from hydrocarbon precursors by well controlled interaction of the latter with elemental fluorine, as pioneered by Margrave and Lagow,' and Lagow and his co-workers.2 Although the convenient reagent cobalt trifluoride, CoF3, is less potent than elemental fluorine, it has long been employed in the synthesis of highly fluorinated organic compounds.' Nevertheless, high temperatures are necessary for the process, depending on the substrate, and this has often resulted in unwanted carboncarbon bond cleavage. Fluorination via the Simons electro-

No abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.