Abstract

The dinuclear organometallic hydrazone [(ii5-Cp)Fe(ii6-p-MeO-C6H4)-NHN=CH-(if-C5H4)Fe()i5-Cp)] PF6- (Cp=C5H5) is stereoselectively prepared as its trans isomer by reacting the organometallic hydrazine precursor [()is-Cp)Fe(if-p-MeO-C6H4)-NHNH2)] PF6- with the ferrocenecarboxaldehyde. Its crystalline and molecular structure has been determined and consists of two iron(ll) sandwiches of the type [(r|5-Cp)Fe(r)6-arene)] and [(r)5-C5H4)Fe(i]5-Cp)], in anti position one with respect to the other, and linked by a zigzag hydrazonic spacer.