Reaction of [MnBr(CO)3(p-Tol-DAB)] (p-Tol-DAB = (p-Tol)NCHN(p-Tol); DAB = 1,4-diaza-1,3-butadiene) with excess [HFe(CO)4− and subsequent protonation yielded the heterodinuclear species [(μ-H)FeMn(CO)6μ,μ′-N(p-Tol)CH2CH2N-(p-Tol)}]. During the reaction neutral, 4e-bonded p-Tol-DAB is reduced to formally dianionic, 8e-bonded 1,2-di-para-tolylaminoethane, as evidenced by an X-ray structure determination
                                    [MnBr(CO)3(p -Tol-
DAB)](p -Tol-
DAB =(p -Tol)N = CH = N(p -Tol); 
DAB = 1,4-二氮杂1,3
丁二烯)与过量的[HFE(CO)4 -和随后的质子化,得到异双核物种[(μ-H)的FeMn(CO)6 μ,μ'-N(p -Tol)CH 2 CH 2 N-(p -Tol)}]。在反应过程中,通过X射线结构测定证明,中性的4e键结合的p -Tol-
DAB还原为正式的双阴离子,8e键结合的1,2-二对对甲
苯胺基
乙烷。