Acid-Free Nitration of Benzene and Toluene in Zeolite NaZSM-5

Figure 6

FT-IR spectra for the reaction of (a) benzene and (b) toluene with NO₂ at 50°C. The traces are time 𝑡=0, the initial exposure of the zeolite plus hydrocarbon to NO₂ (dash); after four hours of reaction (dash-dot); difference (solid).

(a)

(b)