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SELENIUM-BRIDGED CLUSTERS - SYNTHESIS AND CHARACTERIZATION OF SELENIUM-BRIDGED FE-MO CLUSTERS CP2MO2FE2SE3(CO)6, CP2MO2FE2SE2(CO)7, AND CP2MO2FESE(CO)7

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Title SELENIUM-BRIDGED CLUSTERS - SYNTHESIS AND CHARACTERIZATION OF SELENIUM-BRIDGED FE-MO CLUSTERS CP2MO2FE2SE3(CO)6, CP2MO2FE2SE2(CO)7, AND CP2MO2FESE(CO)7
 
Creator MATHUR, P
HOSSAIN, MM
RHEINGOLD, AL
 
Subject transition-metal carbonyls
coordination chemistry
structural characterization
crystal-structure
ligands
complexes
reactivity
anions
se
 
Description Reflux of a benzene solution containing Fe3(CO)9Se2 and Cp2Mo2(CO)6 yielded the known cluster Cp2Mo2Fe2Se3(CO)6 (1) and the new clusters Cp2Mo2Fe2Se2(CO)7 (2) and Cp2Mo2-FeSe(CO)7 (3). Compound 2 was also isolated from the room temperature reaction of Fe2(CO)6Se2 with Cp2Mo2(CO)4. In solution, 2 was found to slowly convert to 1; on thermolysis, the conversion occurs rapidly. Both 2 and 3 have been characterized by spectroscopic and crystallographic methods. 2 crystallizes in the orthorhombic space group Pna2(1) with a = 13.289(3) angstrom, b = 12.059(2) angstrom, c = 13.045(3) angstrom, V = 2090.5(7) angstrom 3, and Z = 4. The structure refined to R = 3.56% and R(w) = 3.65% for 2109 unique reflections (F(o) greater-than-or-equal-to 4sigma-(F(o))). The structure of 2 consists of a Mo2Fe2 tetrahedron with the Fe-Fe edge bridged by a CO group. Triply bridging Se atoms cap the two Mo2Fe faces, and there is a semitriply bridging CO group above one of the MoFe2 faces. The remaining CO groups are terminally bonded. 3 crystallizes in the monoclinic space group C2/c with a = 30.756(7) angstrom, b = 8.590-(1) angstrom, c = 15.115(3) angstrom, beta = 102.86(3)-degrees, V = 3893.4(13) angstrom 3, and Z = 8. The structure refined to R = 4.81% and R(w) = 6.00% for 3103 unique reflections (F(o) greater-than-or-equal-to 4sigma(F(o))). The structure of 3 consists of a Mo2FeSe tetrahedron. Each Mo atom has one Cp and two terminally bonded CO groups, while the Fe atom has three CO groups bonded to it.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-14T19:21:23Z
2011-12-26T12:47:35Z
2011-12-27T05:36:49Z
2011-07-14T19:21:23Z
2011-12-26T12:47:35Z
2011-12-27T05:36:49Z
1994
 
Type Article
 
Identifier ORGANOMETALLICS, 13(10), 3909-3913
0276-7333
http://dx.doi.org/10.1021/om00022a029
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4046
http://hdl.handle.net/10054/4046
 
Language en