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In the 1-azonia-acenaphthene salts 6b and 9, the N + -C peri  bond is modestly elongated. While no clear-cut influence of the peri-stress is obvious, incorporation of C peri  in a triarylmethyl structure has a bond-lengthening effect. However, the stretching forces are insufficient to restore the ideal geometry of the naphthalene skeleton.

zeitschrift für naturforschung b

peri-Interactions in Naphthalenes, 5 [1]. On the Impact of peri-Stress and Trityl-Stress upon the Length of N + -C Bonds in 1-Azonia-acenaphthene Cations