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- W2083193485 abstract "Resume Spectra of the secondary transition of the benzene chromophore, acting as a molecular probe, in molecules φCX (1) X (2) X (3) show surprisingly that the coupling involving π φ and an auxochrome, X (1) for example, through the bonds C α X (2) and C α X (3) has very often almost as much efficiency as a coupling through C α H bonds. Our spectroscopic results show that neither a group nor a given symmetry of the substituent is to be privileged. Thus we develop a model in which no symmetry condition is required. The σ, π coupling is described as a coupling between all the group of substituents on C α acting as a whole, and π φ , through two 2 p orbitals belonging to C α . That coupling scheme is in good agreement with all the intensities of the secondary transition measured at the 00 band of a wide range of molecules. Spectra of species involving one or several at a time of the next bonds have been studied: C α H, C α C, C α CO 2 H, C α CO − 2 , C α NH 2 , C α NH + 3 , C α OH, C α OCH 3 , C α C φ . When two benzene chromophores are involved (C α C φ ) a through space interaction must also be taken into consideration." @default.
- W2083193485 created "2016-06-24" @default.
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- W2083193485 date "1983-01-01" @default.
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- W2083193485 title "Interactions entre groupements non liés dans des molécules φCX(1)X(2)X(3). Influence sur l'intensité de la transition secondaire" @default.
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- W2083193485 doi "https://doi.org/10.1016/0584-8539(83)80120-2" @default.
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