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http://dx.doi.org/10.13160/ricns.2017.10.3.131

13C NMR-Study of 1,1-Dipotassio-2,3,4,5-Tetraphenyl-1-Silacyclopentadienide Dianion [SiC4Ph4] 2-·2[K+ ] and 1,1-Dipotassio-2,3,4,5-Tetraphenyl-1- Germacyclopentadienide Dianion [GeC4Ph4] 2-·2[K+ ]  

Hong, Jang-Hwan (Department of Nanopolymer Material Engineering, Pai Chai University)
Publication Information
Journal of Integrative Natural Science / v.10, no.3, 2017 , pp. 131-136 More about this Journal
Abstract
The chemical shifts in the $^{13}C$ NMR spectra of 2,3,4,5-tetraphenyl-1-silacyclopentdienide dianion $[SiC_4Ph_4]^{2-}{\cdot}2[K^+]$ (3) and 2,3,4,5-tetraphenyl-1-germacyclopentdienide dianion $[GeC_4Ph_4]^{2-}{\cdot}2[K^+]$ (4) were compared to those of $[SiC_4Ph_4]^{2-}{\cdot}2[Li^+]$ (5), $[SiC_4Ph_4]^{2-}{\cdot}2[Na^+]$ (6), and $[GeC_4Ph_4]^{2-}{\cdot}2[Li^+]$ (7). The average polarizations in two phenyl groups of two potassium salts are decreased over 15% to 20% comparing to those of the lithium salts and sodium salt {$[EC_4Ph_4]^{2-}{\cdot}2[M^+]$ (E=Si, Ge, M=Li, Na) due to the effect of the counter potassium cation.
Keywords
Silole; Germole; Dianion; Aromaticity; Potassium;
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