Английская Википедия:Flyover complex

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Файл:Flyover complex.svg
Structure of the flyover complex Fe2(C4H4CO)(CO)6, which has idealized C2-symmetry.

In organometallic chemistry, a flyover complex features two metals bridged by the fragment OC(RC=CR)2. Some flyover complexes are symmetrical and some are not.

Файл:Cp2Fe2(C4(CF3)4CO)CO CPFMFX10.png
Structure of an asymmetrical flyover complex (C5H5)2Fe2[(CCF3)4CO]CO. The Fe-Fe bond length is 258.8 picometers.[1]

Common examples are the iron carbonyl derivatives, which are typically air-stable, soluble in nonpolar solvents, and red-orange in color.[2] These diiron complexes arise by the reaction of alkynes with iron carbonyls. Such reactions are known to generate many products, e.g. complexes of cyclopentadienones and para-quinones.[3]

Some ferrole complexes react with tertiary phosphines to give the substituted flyover complex Fe2(CO)5(PR3)(C4R4CO). They insert alkynes en route to tropones (R6C7O).[4] [5]

References