Synthesis of Alkali Metal Salts of Borylsilyl Anions Utilizing Highly Crowded Silylboranes and Their Properties
作者： Takashi Kajiwara , Nobuhiro Takeda , Takahiro Sasamori , Norihiro Tokitoh
DOI: 10.1021/OM7008974
关键词: Alkali metal 、 Chemistry 、 Ion 、 Diborane 、 Trimethylsilyl 、 Medicinal chemistry 、 Inorganic chemistry 、 Silanes 、 Reactivity (chemistry) 、 Lithium 、 Salt (chemistry)
摘要: The lithium salt of a borylsilyl anion, [Tbt(Mes)SiBpin]–Li+ (11: Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Mes mesityl, pin pinacolato), was synthesized by the boron–metal exchange reaction diborylsilane, Tbt(Mes)Si(Bpin)2 (8), which insertion highly crowded diarylsilylene, Tbt(Mes)Si: (1), into B–B bond diborane(4) compound, B2pin2. Although anion 11 could not be isolated due to its thermal instability, investigation reactivity revealed that is possible precursor for Si-functionalized silylboranes as well Si,Si-difunctionalized silanes. Furthermore, [Tbt(Mes)SiBScat]– (27: Scat dithiocatecholato), procedure similar used 11, showed different from 11. Theoretical calculations anions 27 has boratasilene character; namely, Si–B double-bond character ...
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