Question

please help me analyze the IR of these three compounds. the first one is P-nitrobenzene, the second one is benzaldehyde, and the third one is xylene.

P-Nitrobenzene ཐབབའཛn 30 359095 Transmittance [%] 75 6570 ༢000 500 3500 3 000 2500 2000 Wavenumber cm-1

Answer 1

O IR specteum of P-nites benzene & medium Peaks at 3020 ant and 3090 cm belongs to CH Stretching frequency of colomatic compound Shoep Peak at around 1600 cm' belongs aromatic c=c stretching frequency * sharp and strong Peak at 1540cm' belongs to No steet ching frequency of Noa group * Peaks cround 1580 cus' and 1300 cmt belongs to Ch bending frequencies of aornatic benzene GH group * Share Peak around 1250um belongs to cn stretching frequency of neted group Rx beood Peak around 3350 mm belongs moisture @ water - OH stutching * small Peaks around 2000 um belong aromatic ring, * Strong Peak at scom belongs GH stuching of benzene @ IR specteum of Benzaldeligde bending * Small Peaks around 3020 cm and 3010 cant belong aromatic ring C-H stretching frequency * medium Peaks around 2800 ant and 2750cm bolongs to GH stretching frequency of aldehyde group * Strong and shoup peak at 170cm belongs to & ccabony Stretching frequency of aldehyde * Peak at 155ount belongs to cac stretching frequency of aromatic ring * Peaks around 1450cm and 1380 cm belongs to GH bending frequency of aromatic GH bond also 780um belongs beiding

IR spectrum of xylene *medium peaks around 3080 cmn' and 2020 añ' belongs to cromatic C-H Stretching frequencies * medium Peaks around 2940 am and 2890 cm' belongs to GH stretching frequencig of sp3 aliphatic C-H bond * medium Peak coound 1550 cant belongs to aromatic benzene cac stretching frequency . * Sharp Peaks around 148ount and 1420 ont belongs to C-H bending frequenties of CH₂ and CH ₃ groups * Strong peak at around 780 unt belongs to GH bending frequency of benzene.