The functional groups in an organic compound can frequently be deduced from its

Question

The functional groups in an organic compound can frequently be deduced from its infrared absorption spectrum. A compound containing C, H, and O exhibits strong, broad absorption band at 3450 cm^-1, a sharp band at 3300, and a band at 1200 cm^-1 (m). Relative absorption intensity; (s) = strong, (m) = medium, (w) = weak. What functional class(es) does the compound belong to? List only classes for which evidence is given here. Attach no significance to evidence not cited explicitly. Do not over-interpret exact absorption band positions. None of your inferences should depend on small differences like 10 to 20 cm^-1. The functional class(es) of this compound is(are) (Enter letters from the table below, in any order, with no spaces or commas.) a. alkane (List only if no other functional class applies.) b. alkene c. terminal alkyne d. internal alkyne e. arene f. alcohol g. ether h. amine i. aldehyde or ketone j. carboxylic acid k. ester l. nitrile

Explanation / Answer

3430cm-1 : this is a typical O-H frequency.

3300cm-1 : this would be C triple bond C-H frequency of terminal alkyne

and

2200cm-1 (M) : this would be C triple bond C frequency of alkyne

Thus as per the given data, compound contains terminal alkyne and alcohol.

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