Chlorine randomization between phenyl groups in the electron impact-induced fragmentation of polychlorinated biphenyls
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The mass spectra of dichlorobiphenyls show chlorine randomization over both phenyl rings with the exception of 2,2′- and 2,6-biphenyl (I, e and f) in which both chlorine atoms are ortho to the Ph-Ph bond; similar results are obtained with tetrachlorobiphenyls which show chlorine randomization in the M - Cl2 ion.
author list (cited authors)
Safe, S., & Hutzinger, O.