At 193 nm, cyanobenzene and dicyanobenzene isomers in solid para-hydrogen dissociate chiefly by breaking the ring-CN bond, yielding CN radicals that abstract H from the matrix to form HCN and HNC, with secondary products matching benzene photolysis.
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Infrared Spectroscopy and Photochemistry of Aromatic Nitriles in Para-Hydrogen Matrices
At 193 nm, cyanobenzene and dicyanobenzene isomers in solid para-hydrogen dissociate chiefly by breaking the ring-CN bond, yielding CN radicals that abstract H from the matrix to form HCN and HNC, with secondary products matching benzene photolysis.