Synthesis and Characterization of Iron(II) and Ruthenium(II) Hydrido Hydrazine Complexes

Treatment of trans-[MHCl(dmpe)2] (M = Fe, Ru) with hydrazine afforded the hydrido hydrazine complexes cis- and trans-[MH(N2H4)(dmpe)2]+ which have been characterized by NMR spectroscopy (1H, 31P, and 15N). Both cis and trans isomers of the Fe complex and the trans isomer of the Ru complex were characterized by X-ray crystallography. Reactions with acid and base afforded a range of N2Hx complexes, including several unstable hydrido hydrazido complexes.