Pentasila-1,4-diene: Homoconjugation between Si=Si Double Bonds via a SiMe2 Unit
Pentasila-1,4-diene: Homoconjugation between Si=Si Double Bonds via a SiMe2 Unit
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Pentasila-1,4-diene：Si=Si 双键之间通过 SiMe2 单元的同共轭
DOI：
10.1021/jacs.6b11912
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发表时间：
2017
影响因子：
15
通讯作者：
Takeaki Iwamoto
中科院分区：
文献类型：
--
作者：
Tomoyuki Kosai;Shintaro Ishida;Takeaki Iwamoto
虽然已经报道了几种双(二硅烯)化合物的合成，但已报道的Si--Si双键之间的共轭模式的数量仍然有限。在这里，我们报道了由两个当量的二硅烯4与二氯二甲基硅烷反应得到的稳定的五硅-1，4-二烯1。与相应的单二硅烯和六硅-1，5-二烯相比，1的π(SiSi)→π*(SiSi)吸收带显著展宽和红移，但相对于典型的四硅-1，3-二烯却发生了蓝移。In1的基色位移和吸收带的展宽应归因于通过SiMe2单元的Si--Si双键之间的同位共轭。
Although the synthesis of several bis(disilenes) has already been reported, the number of reported conjugation modes between the SiSi double bonds remains limited. Herein, we report the properties of the stable pentasila-1,4-diene1, which was obtained from the reaction of two equivalents of disilenide4with dichlorodimethylsilane. The π(SiSi)→π*(SiSi) absorption band of1is considerably broadened and red-shifted compared to those of the corresponding monodisilene and hexasila-1,5-diene, but blue-shifted relative to those of typical tetrasila-1,3-dienes. The bathochromic shift and the broadening of the absorption band in1should be attributed to the homoconjugation between SiSi double bonds through the SiMe2unit.