Estimation of Bulkiness of a Highly Sterically Demanding 2,4,6-Tris[bis(trimethylsilyl)methyl]phenyl Group
作者:Renji Okazaki、Masafumi Unno、Naoki Inamoto
DOI:10.1246/cl.1989.791
日期:1989.5
In two different types of reactions the title group behaves as a bulkier group than 2,4,6-tri-t-butylphenyl which has often been used for kinetic stabilization of highly reactive compounds.
An Unexpected Elimination of Cyclopentadienide Anion in the Reaction of Silacyclohexadienes with a Bulky Aryllithium
作者:Keiji Wakita、Norihiro Tokitoh、Renji Okazaki
DOI:10.1246/cl.1998.687
日期:1998.7
The reaction of silacyclohexadienes with an extremely hindered aryllithium, TbtLi (Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl), gave no expected Tbt-subsituted silacyclohexadienes but trihydrosilane, TbtSiH3, via the elimination of cyclopentadienide anion. By contrast, 1,1-difluoro-1-silacyclohexa-2,4-diene underwent a normal substitution though the yield was very low.
Dis; Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Ttm = 2,4,6-tris[(trimethylsilyl)methyl]phenyl, and Dis = bis(trimethylsilyl)methyl)) were synthesized by taking advantage of kinetic stabilization afforded by bulky substituents and characterized by UV/vis and 207Pb NMR spectroscopy. X-ray structural analysis revealed that plumbylene 7a has a V-shaped, monomeric structure. Reactions of these plumbylenes
SYNTHESIS AND PROPERTIES OF THE FIRST DISULFUR AND DISELENIUM COMPLEXES OF PLATINUM
作者:Norihiro Tokitoh、Kazuto Nagata、Nobuhiro Takeda
DOI:10.1080/10426500490428906
日期:2004.4.1
The reactions of overcrowded platinum(0) complexes [PtP(Ar)Me2}2] (Ar = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt), 2,6-bis[bis- (trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl (Bbt)) with elemental sulfur and selenium resulted in the formation of the first platinum disulfur and diselenium complexes, [Pt(S2)P(Ar)Me2}2] (4a (Ar = Tbt), 4b (Ar = Bbt) and [Pt(Se2)P(Ar)Me2}2] (5a