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Reactions of diphosphine-stabilized Os clusters with triphenylantimony: syntheses and structures of new antimony-containing Os clusters Sb-Ph bond cleavage. | LitMetric
The reactivity of the trimetallic clusters [Os(CO)(μ-dppm)] [dppm = bis(diphenylphosphino)methane] and [HOs(CO){μ-PhPCHPPh(CH-μ,σ)}] with triphenylantimony (SbPh) has been examined. [Os(CO)(μ-dppm)] reacts with SbPh in refluxing toluene to yield three new triosmium clusters [Os(CO)(SbPh)(μ-dppm)] (1), [HOs(CO)(SbPh){μ-PhPCHPPh(CH-μ,σ)}] (2), and [HOs(CO)(SbPh)(μ-CH)(μ-SbPh)(μ-dppm)] (3). [HOs(CO){μ-PhPCHPPh(CH-μ,σ)}] reacts with SbPh (excess) at room temperature to afford [Os(CO)(SbPh)(η-Ph)(μ-SbPh)(μ-dppm)] (4) as the sole product. A series of control experiments have also been conducted to establish the relationship between the different products. The molecular structure of each product has been determined by single-crystal X-ray diffraction analysis, and the bonding in these new clusters has been investigated by electronic structure calculations.
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