7318-74-3Relevant articles and documents
Dialkylamino- and alkoxytrialkylstannanes as reagent for synthesis of organoboryl (trialkylsilyl) ketenes
Nikolaeva, S. N.,Zolotareva, A. S.,Ponomarev, S. V.,Petrosyan, V. S.
, p. 857 - 861 (1994)
Dialkylamino- and alkoxytrialkylstannanes have been studied as N- and O-nucleophilic reagents in substitution reactions at the B-Br bond.The previously unknown bis(dialkylamino)- and dialkoxyboryl trialkylsilyl ketenes were synthesized.Some peculiarities of the reactivity of these compounds have been studied. - Key words: dialkylaminotrialkylstannane, alkoxytrialkylstannane, synthesis; borylsilyl ketene, methanolysis, aminolysis.
Contributions to the Chemistry of Boron, 124. Tris(trimethylsilyl)silyl Boranes and Tris(trimethylsilyl)silyl Borates
Biffar, Werner,Noeth, Heinrich
, p. 1509 - 1515 (2007/10/02)
The reactions of several boron halides, methoxides, alkyls and hydrides with tris(trimethylsilyl)silyllithium, which was isolated as the solvate 3SiLi*3C4H8O, 1 (TMSSLi) have been studied. (CH3)2B-Si3 and 9-3Si-9-BBN, were isolated, while 3Si-B(tC4H9)2 could only be detected by 11B NMR.In addition TMSS-B2, (TMSS)2BNMe2 and (TMSS)2BOCH3 were prepared.The methoxyboranes (CH3)3-nB(OCH3)n add to 1 forming silylborates; however, no OCH3/Si3 substitution occurs.The hydrogen bridge in 9-BBN is cleaved symmetrically.The results can be explained by the basicity and the steric requirements of the TMSS group.The TMSS group exhibits a deshielding effect at the boron nucleus relative to the (CH3)3Si group for silylboranes as well as for silylborates. - Keywords: Silylboranes, Silylborates, Steric effects, 11B NMR Spectra