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- W1970112881 abstract "Abstract1,1-Bis(n-butyl)-2,3,4,5-tetraphenyl-1-silacyclopentadiene (3) and 1,1-bis(t-butyl)-2,3,4,5-tetraphenyl-1-silacyclopentadiene(4) are synthesized from the reaction of the versatile silole dianion (2) with n-butyl bromide and t-butyl bromide. Reductionof (3) and (4) with an excess of lithium to give 1,1-bis(n-butyl)-2,5-dilithio-2,3,4,5-tetraphenyl-1-silacyclopenta-3-enide(6) and 1,1-bis(t-butyl)-2,5-dilithio-2,3,4,5-tetraphenyl-1-silacyclopenta-3-enide (7). 13 C-NMR study of two 2,5-carbodianions (6 and 7) shows tert-carbanion at 73.18 and 78.12 ppm respectively. Two bulky tert-butyl groups in (7)increase the inversion barrier at the tert-carbanion, line broadenings of tert-butyl groups in 1 H and 13 C-NMR spectrumare observed.Key words: Silole, tert-Carbanion, 2,5-Carbodianion, Inversion 1. Introduction In last decades a lot of group 14 metalloles have beenprepared [1-6] . Especially their anions/dianions have beenreported to be aromatic systems in experimental [7-25] andtheoretical studies" @default.
- W1970112881 created "2016-06-24" @default.
- W1970112881 creator A5069638614 @default.
- W1970112881 date "2013-06-30" @default.
- W1970112881 modified "2023-09-27" @default.
- W1970112881 title "Synthesis of 1,1-Bis(n-butyl, t-butyl)-2,3,4,5-Tetraphenyl-1-Silacyclopentadiene and NMR Study of Their 2,5-Carbodianions" @default.
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- W1970112881 doi "https://doi.org/10.13160/ricns.2013.6.2.65" @default.
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