Fluorocarbon substitution, found yields

A low-temperature addition reaction occurs between SF5OCl and symmetric fluoroolefins to form pentafluorosulfanylalkyl ethers in nearly quantitative yields (78,90-92). It is found that with unsymmet-rical olefins the chlorine atom of the hypochlorite most often bonds to the olefinic carbon atom with higher electron density. The reactions of SF6OCl and SF5OF with fluorinated ethylenes are used to prepare new SF50-substituted fluorocarbons in 44-77% yield (93). 

Flash-photolysis studies of the hexacarbonyls Cr(CO)g, Mo(CO)g and W(CO)g are, like previous years, still abundant Nayak and Burkey have found that there are low quantum yields for Cr(CO)g substitution in fluorocarbon solvents - which provides yet more evidence that metal-fluorocarbon interactions are very weak There have been estimates made of solvent-metal bond strengths in (Solvent)M(CO)5 complexes (Solvent = Benzene [M = Mo, W] and Tetrachloromethane [M = Cr]) and the photolysis of W(CO)g in the presence of hex-l-ene has been reported Flash-photolysis studies of the photochemical reactions of silanes with Cr(CO)g have been published Using time-resolved infrared spectroscopy RIR), Turner and co-workers have captured the IR spectrum of the MLCT excited state of W(CO)5(4-cyanopyridine) which rapidly decays to W(CO)5. The excited state of W(CO)5(4-cyanopyridine) is relatively long lived, which makes the experiment possible. This reporter will be interested to see how this technique develops. 

No convincing evidence has been found for insertion of carbon-11 from nuclear recoil reactions into C-F bonds of saturated fluorocarbons, in contrast to the situation with alkanes, for which C-H insertion is the most prominent reaction. Recoil F attacks perfluorocycloalkanes to yield products derived from F-for-F substitution, e.g. 

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