Fluoroformyl radicals

Tran -nitroso dimers have been prepared by the reaction of thionitrate esters with (9-acyl derivatives of A-hydroxyl-2-thiopyridines (Scheme 28)., The potential-energy surface for the reaction of the fluoroformyl radical [FC(0)] with NO has been calculated using ab initio studies at the B3LYP level. The reaction was calculated to proceed via addition to NO to form an FC(0)N0 adduct which upon fragmentation yielded FNO and CO. Photo-induced electron-transfer reactions between allylsilane-allylstannane bifunctional reagents and 1,2-diketones have been shown to give a-keto homoallylic alcohols having an allylsilane moiety. 

Acyl Halides. Acyl halides, in which the hydroxyl portion of a carboxyl group is replaced by a halogen, are named by placing the name of the corresponding halide after that of the acyl radical. When another group is present that has priority for citation as principal group or when the acyl halide is attached to a side chain, the prefix haloformyl- is used as, for example, in fluoroformyl-. 

Indirect evidence for the existence of FCO was first obtained by Heras and coworkers73 who added F2 to CO in the presence of 02 and found bis(fluoroformyl) peroxide as a product the mechanism comprising equations 68-70, involving the intermediacy of FCO radicals, was postulated to account for its formation. 

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