excited state of a silicon divalent compound (silylene) with benzene derivatives were discovered. Typically, when a benzene solution of an isolable silylene is irradiated with light of wavelengths longer than 420 nm at room temperature, the corresponding silacyclohepta-2,4,6-triene (silepin) is yielded quantitatively. The photochemical insertion of the silylene toward substituted benzenes occurs in general
发现了二价硅化合物(亚甲硅烷)的激发态与苯衍生物的第一次分子间反应。通常,当在室温下用波长超过 420 nm 的光照射可分离的亚甲硅烷的苯溶液时,会定量地产生相应的 silacyclohepta-2,4,6-triene (silepin)。亚甲硅烷向取代苯的光化学插入通常发生以产生相应的取代的 silene。插入反应对苯中反应中 CC 双键的位阻高度敏感;在亚甲硅烷与取代苯的反应过程中,只有苯环中未取代的CC双键选择性地反应。
Dihydrogen Activation by a Silylium Silylene Frustrated Lewis Pair and the Unexpected Isomerization Reaction of a Protonated Silylene
The isolable silylene 1 forms a frustratedLewispair with silylium ion 2 that is able to split hydrogen under ambient conditions. The protonatedsilylene 3 obtained in this reactionisomerizes to yield the hydrogen‐bridged disilyl cation 4. Cation 4 is fully characterized by NMR spectroscopy and by XRD analysis. Its formation via the protonatedsilylene 3 is indicated by independent synthesis of cation
Stable Push–Pull Disilene: Substantial Donor–Acceptor Interactions through the Si═Si Double Bond
作者:Tomoyuki Kosai、Takeaki Iwamoto
DOI:10.1021/jacs.7b09989
日期:2017.12.20
and properties of 1-amino-2-boryldisilene 1 as the first push-pull disilene. Its spectroscopic and structural features show substantial interactions between the Si═Sidoublebond and the amino and boryl substituents. The π → π* absorption band of 1 is remarkably red-shifted compared to that of the corresponding alkyl-substituted disilene 2. Treatment of 1 with H2 resulted in the cleavage of two molecules
Reactions of an Isolable Dialkylsilylene with Ketones
作者:Shintaro Ishida、Takeaki Iwamoto、Mitsuo Kira
DOI:10.1021/om1004644
日期:2010.11.8
types of ketones such as adamantanone, acetone, benzophenone, and cyclopropenones proceed smoothly at room temperature to afford the corresponding siloxirane, silyl enol ether, 2-oxa-silacyclopentene, and unusual cyclopropenylsilanes, respectively, without formation of any secondary or side-reaction products. The electronicstructure of various types of model carbonyl silaylides was investigated using
Cleavage of Two Hydrogen Molecules by Boryldisilenes
作者:Tomoyuki Kosai、Takeaki Iwamoto
DOI:10.1002/chem.201801286
日期:2018.5.28
Activation of H2 by compounds of main‐groupelements has received considerable attention. Herein, we report synthesis of novel monoboryl‐ and monoamino‐substituted disilenes and their characterization by a combination of NMR spectroscopy and single‐crystal X‐raydiffractionanalysis. The monoboryldisilene reacts with two molecules of H2 to provide the corresponding trihydridodisilane and hydroborane
H 2被主族元素的化合物活化已经引起了广泛的关注。在这里,我们报告了新型单硼烷基和单氨基取代的二烯的合成及其通过NMR光谱和单晶X射线衍射分析的表征。单硼烷基二烯与两个H 2分子反应以提供相应的三氢二硅烷和氢硼烷,而氨基二烯在相同条件下不与H 2反应。目前的结果和我们以前的结果表明,Si = Si双键上存在的硼取代基对于激活H 2是必不可少的。分子。与π*(Si = Si)轨道有效相互作用的硼原子上的低空2p轨道可能是H 2活化的原因。