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FTIR-ATR monitoring of aging reactions in open air. Reaction mixture after (a) gentle manual grinding for 2–3 min; (b) aging for 3 days; (c) 3-nitrobenzonitrile (1a); (d) 3-cyanoaniline (2a); (e) ammonium formate; (f) silica; (g) LAG for 60 min without substrate 1a; (h) LAG-mixture under (g) after aging for 2 h in air.
