1276124-74-3Relevant academic research and scientific papers
Conversions of osmabenzyne and isoosmabenzene
Zhao, Qianyi,Zhu, Jun,Huang, Zi-Ao,Cao, Xiao-Yu,Xia, Haiping
, p. 11597 - 11603,7 (2012)
We report herein the first example of the conversion of metallabenzyne II and isometallabenzene III. The osmium hydride vinylidene complex 1 reacts with HC≡CCH(OEt)2 to give osmabenzyne 3 via isoosmabenzene 2. Compound 3 exhibits high thermal stability in air. Nonetheless, nucleophilic attack at 3 provides isoosmabenzenes 4 a and 4 b, or opens the ring to produce 5 a and 5 b. We propose mechanisms to disclose the intrinsic connection between the six-membered metallacycles, and carry out DFT calculations to rationalize the regioselectivity of the nucleophilic addition reactions. Copyright
Stable iso-osmabenzenes from a formal [3+3] cycloaddition reaction of metal vinylidene with alkynols
Zhao, Qianyi,Gong, Lei,Xu, Chunfa,Zhu, Jun,He, Xumin,Xia, Haiping
, p. 1354 - 1358 (2011/04/22)
The magic of Os: An unprecedented formal [3+3] cycloaddition reaction of 1 with alkynols affords stable iso-osmabenzenes at room temperature (see scheme). The phosphonium substituent at the Cβ position and the 18e - nature of the compound play key roles in the origin of the high thermal stability of the products. Isomerization of iso-osmabenzenes into η5-cyclopentadienyl complexes through metalated cyclopentadiene intermediates is also described.
