88794-44-9Relevant articles and documents
Tempo-spatial chirogenesis. Limonene-induced mirror symmetry breaking of Si[sbnd]Si bond polymers during aggregation in chiral fluidic media
Fujiki, Michiya,Yoshida, Keisuke,Suzuki, Nozomu,Rahim, Nor Azura Abdul,Jalil, Jalilah Abd
, p. 120 - 129 (2016)
Herein, we designed photoluminescent polymer aggregates surrounded by organic media containing (S)-/(R)-limonene and (1S)-/(1R)-α-pinene as an artificial model of an open-flow cell-wall free coacervate in a fluidic medium in the ground and photoexcited states. The aggregates were build-up of stiff circular dichroism (CD)-silent and circularly polarized luminescence (CPL)-silent bis(p-n-butylphenyl)polysilanes, nBuPS, and four other diarylpolysilanes. (S)- and (R)-limonene induced more efficiently to their chirality to nBuPS during aggregation, as proven by CD and CPL spectral analysis, compared to (1S)- and (1R)-α-pinene. The nBuPS aggregates generated in a mixture of limonene, methanol, and chloroform had a dissymmetry factor (gabs) as high as +0.04 for (R)-limonene and ?0.03 for (S)-limonene at the first Cotton band and a weak dissymmetry factor (glum) of +0.004 for (R)-limonene and ?0.003 for (S)-limonene. The gabs factor, however, greatly depended on the volume fraction and chirality of limonene in the tersolvents. These behaviors were ascribed to the tempo-spatial stability and instability of the aggregates suspension in the fluidic media, as revealed by time-course dynamic light scattering measurement.
Dichotomy of Manganese Catalysis via Organometallic or Radical Mechanism: Stereodivergent Hydrosilylation of Alkynes
Yang, Xiaoxu,Wang, Congyang
supporting information, p. 923 - 928 (2018/01/01)
Herein, we disclose the first manganese-catalyzed hydrosilylation of alkynes featuring diverse selectivities. The highly selective formation of E-products was achieved by using mononuclear MnBr(CO)5 with the arsenic ligand, AsPh3. Whereas using the dinuclear catalyst Mn2(CO)10 and LPO (dilauroyl peroxide) enabled the reversed generation of Z-products in good to excellent stereo- and regioselectivity. Such a way of controlling the reaction stereoselectivity is unprecedented. Mechanistic experiments revealed the dichotomy of manganese catalysis via organometallic and radical pathways operating in the E- and Z-selective routes, respectively.
Metalation Reactions of 1-Silacyclo-3-pentenes
Horvath, R. F.,Chan, T. H.
, p. 4489 - 4494 (2007/10/02)
The metalation of a series of 1-silacyclo-3-pentenes was studied.The reaction depends critically on the substituent at the silicon. 1,1-Bis(4-tert-butylphenyl)-1-silacyclo-3-pentene was metalated cleanly to give the anion derived from proton abstraction o
