ADDITION OF 2-PYRIDYLSELENYL HALIDES TO UNACTIVATED NITRILESADDITION OF 2-PYRIDYLSELENYL 
HALIDES TO UNACTIVATED 
NITRILES 2-Pyridylselenenyl versus 2-Pyridyltellurenyl Halides: Symmetrical Chalcogen Bonding in the Solid State and Reactivity towards NitrilesBuslov I.V., 
Novikov A.S., 
Khrustalev V.N., 
Grudova M.V., 
Kubasov A.S., 
Matsulevich Z.V., 
Borisov A.V., 
Lukiyanova J.M., 
Grishina M.M., 
Kirichuk A.A., 
Serebryanskaya T.V., 
Kritchenkov A.S., 
Tskhovrebov A.G. . In contrast to 2-pyridylselenenyl 
halides, the Te congener does not react with 
nitriles furnishing cyclization
 Study of the reactivity of organonickel sigma-complexes towards nitriles,4,6-triisopropylphenyl (Tipp), 2,4,6-tricyclohexylphenyl (Tchp), bpy = 2,2´-bipyridine, towards 
nitriles (acetonitrile