Journal of Integrative Natural Science (통합자연과학논문집)

The Basic Science Institute Chosun University (조선대학교 기초과학연구원)
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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)
  • Received : 2017.08.18
  • Accepted : 2017.09.25
  • Published : 2017.09.30
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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.

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References

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