NMR Investigation of Tetrad Splitting in Regularly Alternating Diphenylene Oxide–Diphenylene Sulfide Copolyarylenephthalides of Periodic Structure

V. A. Kraikin; Крайкин В. А.; A. A. Fatykhov; Фатыхов А. А.; N. G. Gileva; Гилева Н. Г.; T. A. Yangirov; Янгиров Т. А.; S. N. Salazkin; Салазкин С. Н.

doi:10.31857/S230811392370033X

NMR Investigation of Tetrad Splitting in Regularly Alternating Diphenylene Oxide–Diphenylene Sulfide Copolyarylenephthalides of Periodic Structure

Authors: Kraikin V.A.¹, Fatykhov A.A.¹, Gileva N.G.¹, Yangirov T.A.¹, Salazkin S.N.²
Affiliations:
1. Ufa Institute of Chemistry, Ufa Federal Research Center, Russian Academy of Sciences
2. A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences
Issue: Vol 65, No 1 (2023)
Pages: 72-80
Section: Articles
URL: https://ogarev-online.ru/2308-1139/article/view/135620
DOI: https://doi.org/10.31857/S230811392370033X
EDN: https://elibrary.ru/PICMVM
ID: 135620

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Abstract

Tetrad splitting of the quaternary sp3-hybridized carbon atom in a series of model (co)poly-arylenephthalides differing in the length of the phenyleneoxyphthalide (O) and phenylenethiophthalide (S) sequences: O-1, OOOS-2, OOS-3, OS-4, SSO-5, SSSO-6, S-7, and OOSS-8 has been studied using the increments method. Basing on the analysis of the amplitude values of the dyad increments, the tetrad increments have been calculated and the position of the signals of the tetrads in the 13С NMR spectra of the individual (co)polyarylenephthalides and their mixtures has been predicted. Validity of the calculations has been confirmed by the coincidence between the predicted and the experimental values of the dyad and tetrad increments for the specifically synthesized (co)polyarylenephthalide OOSS-8, the spectra of the mixtures of the (co)polyarylenephthalides with equimolar content of the split tetrads, and good coincidence of their starting compositions calculated from the deconvoluted spectra.

References

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