188030-63-9Relevant academic research and scientific papers
Chemistry of molybdaboranes: Synthesis, structures, and characterization of a new class of open-cage dimolybdaheteroborane clusters
Dhayal, Rajendra Singh,Chakrahari, Kiran Kumar Varma,Varghese, Babu,Mobin, Shaikh M.,Ghosh, Sundargopal
, p. 7741 - 7747 (2010/11/04)
Reaction of [CpMoCl4], 1 (Cp* = η5-C 5Me5), with [LiBH4 thf] in toluene at -70 °C, followed by pyrolysis with excess dichalcogenides RE-ER (R = Ph, CH 2Ph, 2,6-(tBu)2-C6H2OH, (CH3)3C = tBu); E = S, Se) yielded a new class of hybrid clusters, 3-8: (3, [(CpMo)2(μ-η1-SPh) 2(μ3-S)(H2BSPh)]; 4, [(CpMo) 2B5H8(SPh)]; 5, [(CpMo)2B 5H8(SePh)]; 6, [(CpMo)2B2S 2H2(μ-η1-S)]; 7, [(CpMo) 2B2H5(BSR)2(μ-η1- SR)], (R = 2,6-(tBu)2-C6H2OH); and 8, [(CpMo)2B2H5(BSePh)2(μ- η1-SePh)]. Compounds 3-8 have been isolated in modest yields as green or brown crystalline solids. In parallel with 3-8, [(CpMo) 2B5H9] was isolated as a major product in all cases. The isolation and structural characterization of compounds 3 and 6-8 provided the first direct evidence of the existence of [(CpMo)2B 4H8], 2, an intermediate in the formation of [(CpMo) 2B5H9]. These new compounds have been characterized in solution by mass spectrometry, 1H, 11B, 13C NMR, and IR spectroscopy, and elemental analysis. The structural types were unequivocally established by X-ray crystallographic analysis of compounds 3-8.
