sapling learning Label the stretches in the IR spectrum shown that confirm the p

Question

sapling learning Label the stretches in the IR spectrum shown that confirm the presence of benz in the sample. Then identify a stretch that would indicate the presence of starting material (benzoin) Infrared Spectrum of Benzi KBr Identify which of the following stretches would indicate the 3100 cm starting material (benzoin) is 45 still present? O narrow stretch at -1500 cm 35 1575 cm broad stretch at -3300 cm 1 30 25 O narrow stretch at ~3300 cm 20 1640 cm O broad stretch at -1700 cm 4000 3500 3000 2500 2000 500 1000 Wavenumbers (cm 1) sp2, c o sp2 c c sp 2, c-H Previous Check Answer Next GE Exit Hint

Explanation / Answer

3100 cm-1 : sp2 C-H

2850-3000 cm-1 : sp3 C-H

1640-1810 cm -1 : sp2 C=O

680 cm -1 : sp CH

1600-1680 : sp2 C=C

Broad Strech 3300 cm -1 and narrow strech at 1700 cm-1

3100: CH aromatic streching of Benzil

1575 cm-1: C=O

1640 cm-1: C=O

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