title: A Sulfide-Bridged Diiron(II) Complex with acis-N2H4Ligand.
abstract: A sulfide-bridged diiron(II) complex bearing acis-N2H4(hydrazine) ligand has been prepared by reaction of LFeII(μ-S)FeIIL (1; L = sterically encumbered βdiketiminate ligand) with 2 molar equivalents of N2H4. The metastable diiron(II) hydrazine complex LFeII(μ-S)(μH N-NH2)FeII(3) is formed, as shown by crystallography, and NMR, vibrational, and electronic absorption spectroscopies. Compound3has been crystallographically characterized as its DBU (1,8-diazabicyclo[5.4.0]undec-7$ene) adduct, which exhibits weak N-H···DBU hydrogen bonding. The synthetic process evolves roughly 2 equivalents of NH3. Thecis-N2H4bridge in3may be relevant to the structure and function of intermediates on the FeMoco of nitrogenase.
authors.affiliation: Department of Chemistry University of Rochester Rochester, NY, USA 14627.
authors.forename: Bryan D
authors.initials: BD
authors.lastname: Stubbert
authors.affiliation: Department of Chemistry University of Rochester Rochester, NY, USA 14627.
authors.forename: Javier
authors.initials: J
authors.lastname: Vela
authors.affiliation: Department of Chemistry University of Rochester Rochester, NY, USA 14627.
authors.forename: William W
authors.initials: WW
authors.lastname: Brennessel
authors.affiliation: Department of Chemistry University of Rochester Rochester, NY, USA 14627.
authors.forename: Patrick L
authors.initials: PL
authors.lastname: Holland
keywords: Coordination chemistry; FeMoco; Hydrazine; Iron sulfide; Nitrogenase; Werner complex