Pure hydrogen cyanide HCN (top) and methanimine CH2NH (bottom) infrared spectrum at T = 15 K before hydrogenation. Synthesis by-products are observed from their bands marked with an asterisk. The bands at 1010, 1628, and 3377 cm-1 correspond to NH3 remaining from the CH2NH synthesis, and the band at 2349 cm-1 corresponds to CO2 issued from the decomposition of stearic acid during the HCN synthesis.
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