Tetrahedron

Synthesis 13 C NMR, λ max and MMP2 calculations of two 'tailor-made'α-conjugated hexamethylsexithiophenes.

G Barbarella, A Bongini, M Zambianchi

文献索引：Barbarella, Giovanna; Bongini, Alessandro; Zambianchi, Massimo Tetrahedron, 1992 , vol. 48, # 32 p. 6701 - 6708

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被引用次数: 25

摘要

3, 3′, 4 ″, 3‴, 4‴′, 3‴″-and 4, 4′, 3 ″, 4‴, 3‴′, 4‴″-hexamethyl 2, 2′: 5′, 2 ″: 5 ″, 2‴: 5‴, 2‴′: 5‴′, 2‴″sexithiophenes (I and II) have been prepared by nickel- phosphine catalyzed Grignard coupling and their conformational properties investigated with the aid of 13C NMR spectra and MMP2 force field calculations. Owing to the presence of the substituents, the molecular skeletons are not planar and large blue shifts of the ...