Abstract

The neutral air-sensitive Fe(II) hydrazonyl complex CpFe{(?-C 6H5)NN=CHC6H4-p-NMe2} (2) is obtained by deprotonation of its cationic hydrazone precursor [CpFe{(?6-C6H5)NHN=CHC6H 4-p-NMe2}]+PF6- (1) with t-BuOK in tetrahydrofuran. The spectroscopic data, the X-ray molecular structure, and a DFT MO analysis revealed that 2 is best described as a hybrid of ?5-iminocyclohexadienyl and ?6-zwitterionic complexes.