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

被引:19
作者
Koutmos, M [1 ]
Coucouvanis, D [1 ]
机构
[1] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA
关键词
D O I
10.1021/ic049275w
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The synthesis and structure of the first Mo/Fe/S/BH4 cluster is reported. Reaction of (Cl-4-cat)(2)Mo2Fe6S8(PPr3)(6) with 4 equiv of Bu4NBH4 results in the formation of [(Cl-4-cat)(PPr3)MoFe3S4(BH4)(2)](2-)(Bu4N)(4) (Cl-4-cat = tetrachloro-catecholate) which has been fully characterized. X-ray structural determination of this double-fused cubane reveals four BH4- 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.
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页码:6508 / 6510
页数:3
相关论文
共 15 条
[1]   THE UNUSUAL METAL-CLUSTERS OF NITROGENASE - STRUCTURAL FEATURES REVEALED BY X-RAY ANOMALOUS DIFFRACTION STUDIES OF THE MOFE PROTEIN FROM CLOSTRIDIUM-PASTEURIANUM [J].
BOLIN, JT ;
RONCO, AE ;
MORGAN, TV ;
MORTENSON, LE ;
XUONG, NH .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1993, 90 (03) :1078-1082
[2]   Synthesis and characterization of sulfur-voided cubanes.: Structural analogues for the MoFe3S3 subunit in the nitrogenase cofactor [J].
Coucouvanis, D ;
Han, JH ;
Moon, N .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (02) :216-224
[3]   The consequences of an interstitial N atom in the FeMo cofactor of nitrogenase [J].
Dance, I .
CHEMICAL COMMUNICATIONS, 2003, (03) :324-325
[4]   Nitrogenase MoFe-protein at 1.16 Å resolution:: A central ligand in the FeMo-cofactor [J].
Einsle, O ;
Tezcan, FA ;
Andrade, SLA ;
Schmid, B ;
Yoshida, M ;
Howard, JB ;
Rees, DC .
SCIENCE, 2002, 297 (5587) :1696-1700
[5]   CRYSTALLOGRAPHIC STRUCTURE OF THE NITROGENASE IRON PROTEIN FROM AZOTOBACTER-VINELANDII [J].
GEORGIADIS, MM ;
KOMIYA, H ;
CHAKRABARTI, P ;
WOO, D ;
KORNUC, JJ ;
REES, DC .
SCIENCE, 1992, 257 (5077) :1653-1659
[6]   Rational synthesis of high nuclearity Mo/Fe/S clusters:: The reductive coupling approach in the convenient synthesis of (Cl4-cat)2Mo2Fe6S8(PR3)6 [R = Et, nPr, nBu] and the new [(Cl4-cat)2Mo2Fe2S3O(PEt3)3Cl]•1/2(Fe(PEt3)2(MeCN)4) and (Cl4-cat)2Mo2Fe3S5(PEt3)5 clusters [J].
Han, J ;
Koutmos, M ;
Al Ahmad, S ;
Coucouvanis, D .
INORGANIC CHEMISTRY, 2001, 40 (23) :5985-5999
[7]   Modeling a central ligand in the nitrogenase FeMo cofactor [J].
Hinnemann, B ;
Norskov, JK .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (06) :1466-1467
[8]   Structural basis of biological nitrogen fixation [J].
Howard, JB ;
Rees, DC .
CHEMICAL REVIEWS, 1996, 96 (07) :2965-2982
[9]   Density functional theory calculations and exploration of a possible mechanism of N2 reduction by nitrogenase [J].
Huniar, U ;
Ahlrichs, R ;
Coucouvanis, D .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (08) :2588-2601
[10]   STRUCTURAL MODELS FOR THE METAL CENTERS IN THE NITROGENASE MOLYBDENUM-IRON PROTEIN [J].
KIM, JS ;
REES, DC .
SCIENCE, 1992, 257 (5077) :1677-1682