The reaction of [Cp*MoCl 4] with an excess of LiBH 4, followed by thermolysis with tellurium powder in toluene, afforded a tricapped cubane cluster, [(Cp*Mo) 4B 4H 4(μ 4-BH) 3] (1), which represents an unprecedented metal-rich metallaborane cluster with a cubane core containing 58 cluster valence electrons (cve) and three metal-metal bonds. © 2011 American Chemical Society.

Sundargopal Ghosh

Department Of Chemistry

borane derivative

Molybdenum

organometallic compound

article

chemical structure

chemistry

synthesis

Boranes

Molecular Structure

Organometallic Compounds

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IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

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IIT Madras

Inorganic Chemistry

The thermolysis of [(Cp*Mo)2B4H 4S2], 1 with [Fe2(CO)9] yielded eleven vertex dimolybdathiaborane cluster [(Cp*Mo)2B 4H2S2Fe4(CO)9(μ-CO)], 2 together with cubane-type [(Cp*Mo)2(μ3-S) 2B2H(μ-H){Fe(CO)2}2Fe(CO) 3], 3 and a fused cluster [(Cp*Mo)2B 4H4S2 Fe2(CO)5], 4. In a similar fashion, thermolysis of [(Cp*Mo)2B4H 4Se2], 5 with [Fe2(CO)9] yielded tetracapped pentagonal bipyramidal [(Cp*Mo)2B3H 3Se2{Fe(CO)2}2{Fe(CO) 3}2], 6, and an incomplete cubane-type cluster [(Cp*Mo)2BH(μ3-Se)2Fe 2(CO)7], 7. In parallel with the formation of 6 and 7, clusters [(Cp*Mo)2(μ3-Se)2B 2H(μ-H){Fe(CO)2}2Fe(CO)3], 8 and [(Cp*Mo)2B4 H4Se2Fe 2(CO)5], 9 were obtained albeit in low isolated yields. Cluster 6 exhibits tetracapped pentagonal bipyramidal geometry, having 98 cluster valence electrons, appropriate for its geometric structure. The thermolysis of 9 in presence of [Co2(CO)8] led to the isolation of [(Cp*Mo)2B3H2Se 2Co(CO)(μ-CO)3{Fe4(CO)7}], 10. The structure analysis shows that both of the clusters 2 and 10 are based on 11-vertex closo-cage geometry and the core geometry of them can be derived from tricapped square antiprism by performing diamond-square-diamond (dsd) rearrangement. All new metallaheteroborane compounds have been fully characterized by various spectroscopic techniques and elemental analyses and the geometric structures were unequivocally established by crystallographic analysis of 2, 6, 7 and 10. © 2012 Elsevier B.V. All rights reserved.

Journal of Organometallic Chemistry

Synthesis and characterization of novel eleven-vertex dimetallaheteroborane clusters containing Heavier group 16 elements

Benezit Dictionary of Artists

Balthasar von Ottingen

Angewandte Chemie

A Family of Heterometallic Cubane-Type Clusters with anexo-Fe(CO)3Fragment Anchored to the Cubane

Molecular Clusters

Organometallics

Synthesis and Characterization of (Cp*Ru)3Co(CO)2(μ3-CO)B3H3(Cp* = η5-C5Me5): A Metallaborane with Cubane Cluster Structure

Journal of the American Chemical Society

Synthesis and Structure of the Metallaborane Cp*3(μ-H)W3B8H8from the Thermolysis of Cp*H3WB4H8(Cp* = η5-C5Me5). A Close-Packed 11-Atom Boron-Rich Cluster

A homometallic tricapped cubane cluster: [(Cp*Mo) 4B 4H 4(μ 4-BH) 3] (Cp* = η 5-C 5Me 5)

Journal	Inorganic Chemistry
ISSN	00201669
Open Access	No