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Abstract

A preliminary investigation of the direct reaction of elemental sulfur with the representative metallaboranes [6-(η⁵-C₅Me₅)-nido-6-RhB₉H₁₃] and [6-(η⁶-MeC₆Me₄i-Pr)-nido-6-RuB₉H₁₃] in the presence of base gives products that result from (i) the addition of one sulfur vertex and (ii) the addition of two sulfur vertices into the metallaborane cluster, as well as (iii) boron-vertex elimination accompanied by sulfur-vertex addition. Products characterised include [7-(η⁵-C₅Me₅)-nido-7,11,12-RhS₂B₉H₉], [7-(η⁶-MeC₆H₄i-Pr)-nido-7,11,12-RuS₂B₉H₉], [8-(η⁶-MeC₆H₄i-Pr)-nido-8,7-RuSB₉H₁₁], and a species tentatively identified as [9-(η⁶-MeC₆H₄i-Pr)-nido-9,7,8-RuS₂B₈H₈].

Keywords: Metallaborane; Thiametallaborane; Cluster; NMR; Metallaboranes, reactions of; Elemental sulfur.