Characteristic th Absorptions of Some Functional Groups In the box provided, write the If frequency or range of frequencies that would best distingulsh between the two compounds shown. Specif which compound (A ar b) will display a band at this frequency in its IR spectrum. (Choosu the most prominent frequency. Do not include units in your answer. Use onfy the frequencies listod in the table given above. Write the letter of the compound, followed by the range of frequencies, separated by a comma. Example. "A, i6oo-1850") Compound ( A or B), IR frequency or range of frequencies