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The failure of the sum of van der Waals radii axiom to provide information about donor-acceptor interactions in 8-dimethylamino-naphth-1-yl phosphines and their derivatives called for alternative methods. The coupling constants J(C,H) of the Me 2 N groups proved useful and indicate that in these compounds, N→P interactions are negligible.

zeitschrift für naturforschung b

peri-Interactions in Naphthalenes, 11 . A New Approach to the Investigation of Dative peri Bonding/A New Approach to the Investigation of Dative peri Bonding