Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16080
Title: Preparation and reactions of tetrahedrane-type clusters containing a SCoFeM (M = Mo or W) core. The single crystal X-ray structure of the cluster (μ3-S)CoFeMo(CO)8 [η5-C5H4C (O)CH2CH2CO2Me]
Authors: Zhang, YH
Yuan, JC
Yin, YQ
Zhou, ZY
Chan, ASC
Issue Date: 2001
Source: Polyhedron, 2001, v. 20, no. 15-16, p. 1859-1865
Abstract: Treatment of the monoanions {(M(CO)3[η5-C5H4C (O)CH2CH2CO2Me]})- with FeCo2(CO)9(μ3-S) in refluxing THF gave the novel cluster complexes (μ3-S)CoFeM (CO)8 [η5-C5H4C (O)CH2CH2CO2Me] (M = Mo, 1; M = W, 2). Reactions of the cluster (μ3-S)CoFeMo(CO)8 [η5-C5H4C(O)Me] (3) with amine derivatives 2,4-dinitrophenylhydrazine, thiosemicarbazide, (-)-5-(α-phenyl)semioxamazide and L-(+)-menthydrazide respectively at room temperature yielded four new hydrazone cluster complexes (μ3-S)CoFeMo (CO)8[η5-C5H4C(NR)Me] [4-7, R = NHC6H3-2,4-(NO2)2, NHC(S)NH2, NHC(O)C(O)NHCH(Me)(C6H5) and NHCO2(menthyl)]. However, cluster 1 only reacted with 2,4-dinitrophenylhydrazine to give the cluster (μ3-S)CoFeMo(CO)8 [η5-C5H4C(NR)Me] [8, R = NHC6H3-2,4-(NO2)2] under the same conditions. Although two kinds of optically active groups have been attached to the racemic cluster, the mixture of diastereoisomers produced cannot be separated chromatographically. The 13C NMR showed the presence of the diastereoisomers of clusters 5 and 6. Cluster 1 has been solved by single-crystal X-ray diffraction.
Keywords: Chiral
Cluster complexes
Crystal structures
Diastereoisomers
Enantiomeric separation
Transition metals
Journal: Polyhedron 
ISSN: 0277-5387
DOI: 10.1016/S0277-5387(01)00778-1
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