New Molybdaborane Clusters with a Bridged Phosphido Ligand |
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| Authors: | Kiran Kumar Varma Chakrahari Shaik M. Mobin Sundargopal Ghosh |
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| Affiliation: | (1) Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India;(2) National Single Crystal X-ray Diffraction Facility, Indian Institute of Technology Bombay, Mumbai, 400 076, India; |
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| Abstract: | Abstract Treatment of [Cp*MoCl4], 1 (Cp* = η5-C5Me5), with [LiBH4.thf] in toluene at −40 °C, followed by thermolysis with [(thf)Li{CH(PPh2–BH3)2}] results in the formation of a new class of phosphido bridged molybdaborane [(Cp*Mo)2B4H7(μ-PPh2)], 2 which has been characterized crystallographically. In addition, the above reaction also produces known [(Cp*Mo)2B5H9], 3 and an unusual molybdaborane [(Cp*Mo)2B5H8(O i Pr)], 4 ( i Pr = –CH(CH3)2). All the new compounds have been characterized in solution by 1H, 11B, 13C, 31P NMR spectroscopy and the structural types were unambiguously established by X-ray crystallographic analysis of compounds 2 and 4. |
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