From analysis of the geometry of the attractive intramolecular interactions between the pyridine N atoms and the nitrile C atoms in title compound 2 it is proposed that the most favoured direction of approach of a nucleophile to an sp C(![[triple bond, length half m-dash]](https://www.rsc.org/images/entities/char_e007.gif)
N) makes an angle of at least 108° to the triple bond.
P. N. W. Baxter, J. A. Connor, D. C. Povey and J. D. Wallis, J. Chem. Soc., Chem. Commun., 1991, 1135 DOI: 10.1039/C39910001135
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