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A Sulfide‐Bridged Diiron(II) Complex with a N 2 H 4 Ligand
Author(s) -
Stubbert Bryan D.,
Vela Javier,
Brennessel William W.,
Holland Patrick L.
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300163
Subject(s) - chemistry , ligand (biochemistry) , adduct , steric effects , crystallography , hydrazine (antidepressant) , sulfide , medicinal chemistry , stereochemistry , octahedron , crystal structure , organic chemistry , biochemistry , receptor , chromatography
Abstract A sulfide‐bridged diiron(II) complex bearing a cis ‐N 2 H 4 (hydrazine) ligand has been prepared by reaction of LFe II (μ‐S)Fe II L ( 1 ; L = sterically encumbered β‐diketiminate ligand) with 2 molar equivalents of N 2 H 4 . The metastable diiron(II) hydrazine complex LFe II (μ‐S)(μ‐H 2 N–NH 2 )Fe II L ( 3 ) is formed, as shown by crystallography, NMR, vibrational, and electronic absorption spectroscopy. Compound 3 has 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 NH 3 . The cis ‐N 2 H 4 bridge in 3 may be relevant to the structure and function of intermediates on the FeMoco of nitrogenase.