and Spectrum

Exam

Name___________________________________


MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) Which compound would be expected to show intense IR absorption at 3300 cm-1? 1)
A) butane B) CH3 CH2 CCH
C) CH3 CCCH3 D) but-1-ene


2) Which compound would be expected to show intense IR absorption at 2820, 2710 and 1705 cm -1? 2)
A) CH3 COCH2 CH3 B) CH2 CHCOCH3
C) PhCOCH3 D) PhCHO


3) Which compound would be expected to show intense IR absorption at 2250 cm-1? 3)
A) (CH3 )2CHCN B) CH3 CH2 CH2 CO2 H
C) CH3 CH2CH2 CONH2 D) (CH3 )2 CHCH2 OH


SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

4) Which compound would be expected to show intense IR absorption at 1680 cm-1? 4)




ESSAY. Write your answer in the space provided or on a separate sheet of paper.

5) Deduce a possible structure for the compound with the IR absorptions below.

C3 H3Br: 3300, 2900, 2100 cm-1


6) Deduce a possible structure for the compound with the IR absorptions below.

C3 H5N: 2950, 2250 cm -1


7) Deduce a possible structure for the compound with the IR absorptions below.

C5 H8O: 2950, 1750 cm-1


8) Deduce a possible structure for the compound with the IR absorptions below.

C4 H8O: 2950, 2820, 2715, 1715 cm-1




1