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![Solid-phase Synthesis of [4.4] Spirocyclic Oximes](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F58508.jpg&w=3840&q=50)
Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
Twisted push-pull disilenes obtained by direct 1,2-hydro/chloroborylation of a silylone
Taichi Koike1, Takeaki Iwamoto1
1Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan. takeaki.iwamoto@tohoku.ac.jp.
Abstract:
Overcrowded 1-amino-2-boryldisilenes were isolated as blue crystals by the direct hydro/chloroborylation of a cyclic (alkyl)(amino)silylene-coordinated monatomic silicon complex (silylone) with 9-BBN (BBN = borabicyclo[3.3.1]nonane) hydride/chloride. The extreme twisting and push-pull effect around the SiSi bonds resulted in strong polarization of the SiSi bond. The disilenes exhibit longest-wavelength absorptions above 600 nm due to the charge-transfer-type π → π* transitions and undergo reversible 1,3-hydride/halide migration in solution reflecting the electrophilic terminal silicon atoms.
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