Electron density distributions in substituted 2,3,4,5-tetraphenyl-1-germacyclopenta-2,4-dienes studied by NMR spectroscopy View Full Text


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Article Info

DATE

1997-11

AUTHORS

S. N. Tandura, S. P. Kolesnikov, K. S. Nosov, V. Ya. Lee, M. P. Egorov, O. M. Nefedov

ABSTRACT

The signals in the13C NMR spectra of 2,3,4,5-tetraphenyl-1-germacyclopenta-2,4-dienes (R1=R2=H, Me,cyclo-C3H5, SiMe3, SnMe3, R1=Me, R2=H, Cl) were completely assigned using 2D NMR spectroscopy. The pattern of the variation of the chemical shifts in the13C NMR spectra indicates that the effects of substituents R1 and R2 on the heterocycle and on the phenyl groups are of inductive rather than mesomeric origin and include the direct through-space polarization of bonds (field effect). More... »

PAGES

1859-1861

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02503773

DOI

http://dx.doi.org/10.1007/bf02503773

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1026801288


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