← IR spectra Wavenumbers Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All 3200-3550 O-H alcohol; strong and broad 3300-3500 N-H; medium intensity 2500-3000 O-H carboxlyic acid; broad peak, w/ variable intensity 1630-1780 C=O; strong absorption C=O Amide, Ketone, Aldehydes, Carboxylic Acid, Esters C-O single bond Alcohols, ETHERs