Question

IN Pick one of the four C6H120 isomers drawn below that matches the infrared spectrum below. Justify your choice by assigning key features in the spectrum. Primary OH So I OH 0 c= 0 Ketone I Aromatic 900 absorbance 260 c-c 1625 OH /l/2875 133001 310°58 anomai s to bobo 1860 1850 1200 Tab 000000 1860 bobo 3.600 10000 bobo bobo 3abo 18001400 cm Copr. 2016-2018 Bio-Rad. All Rights Reserved

Answer 1

peak at 1625 cm-1 is weak suggests C=C, C=O (strong peak expected) is excluded

3300 cm-1 is broad suggests -OH group

3100 cm-1 suggest -C=C stretch

therefore your assigment for rightmost compound is correct