Borohydride anions as terminal ligands on a Fe/Mo/S cluster. Synthesis, structure, and characterization of the [(Cl4-cat)(PPr3)MoFe3S4(BH4)2]2(Bu4N)4 double-fused cubane.
The synthesis and structure of the first Mo/Fe/S/BH(4) cluster is reported. Reaction of (Cl(4)-cat)(2)Mo(2)Fe(6)S(8)(PPr(3))(6) with 4 equiv of Bu(4)NBH(4) results in the formation of [(Cl(4)-cat)(PPr(3))MoFe(3)S(4)(BH(4))(2)](2)(Bu(4)N)(4) (Cl(4)-cat = tetrachloro-catecholate) which has been fully characterized. X-ray structural determination of this double-fused cubane reveals four BH(4)(-) ligands bound to four Fe atoms in a bidentate fashion. A synopsis of the solution characterization as well as the reactivity of this cluster is also presented.
Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, USA.
Markos
M
Koutmos
Dimitri
D
Coucouvanis
D001894:Borohydrides / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007501:Iron / Q000737:chemistry; D008024:Ligands; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry; D009591:Nitrogenase / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry
D001894:Borohydrides; D008024:Ligands; D009942:Organometallic Compounds; D013455:Sulfur; D008982:Molybdenum; D007501:Iron; D009591:Nitrogenase