Abstract: | About Chemistry and Structure of Olefin-monocyano-dicarbonyl-ferrate Anions By the reactions of olenFe(CO)3 olen = C5H8(isoprene), C7H10(cycloheptadiene-1,3), C8H14(2,5-dimethylhexadiene-1,3)] with sodium bis trimethylsilyl]amide the new anions olenFe(CO)2CN]? are formed. All so far known olenFe(CO)2CN]? complexes olen = C5H8(isoprene), C7H10cycloheptadiene-1,3], C4H6(butadiene), C5H8(pentadiene-1,3), C6H8(cyclohexadine-1,3), C6H10(2,3-dimethylbutadiene), C8H8(cyclooctatetraene)] have fluctional structures in solution as shown by 13C NMR spectroscopic investigations. At low temperatures only the isomer exists, in which the CN? ligand and one of the two CO molecules occuppy the basal positions of a square pyramide together with 2 C atoms of the diene part. |