PREPARATION OF 1,3-BIS(η5-CYCLOPENTADIENYLDICARBONYLIRON)-1-CYANO-2,4-DIPHENYLCYCLOBUT-2-ENE AND ITS TRANSFORMATION INTO 1,3-BIS(η5-CYCLOPENTADIENYLDICARBONYLIRON)-1-CYANO-2,2-DIPHENYLBUTA-1,3-DIENE; FACILE C-C BOND CLEAVAGE IN A CYCLOBUTENE RING

Article abstract of DOI:10.1016/0022-328X(85)87341-1

The reaction between the cationic diiron complex <*> (I) and sodium cyanide gives the neutral complex <*> (III).By heating in solution III undergoes an opening of its cyclobutene ring via C-C bond cleavage, yielding the butadiene derivative Cp(OC)2FeC(CN)=CPhC=CHPh (IV).III and IV are characterized by X-ray diffraction studies, IR and NMR spectroscopy.