I JUST WASNT SURE WHAT THEY ASKING FORE, QUIZ QUESTION I WANNA MAKE SURE I AM GE

Question

I JUST WASNT SURE WHAT THEY ASKING FORE, QUIZ QUESTION I WANNA MAKE SURE I AM GETTING CORRECT ANSWER WITH IT

8.) What are some characteristic absorptions in IR spectra associated with compounds containing the following functional groups? (a) alkanes (b) alkenes (c) terminal alkynes (d) internal alkynes (e) alcohols (f) ethers (g) primary amines (h) secondary amines (i) aldehydes (j) ketones (k) carboxylic acids (l) esters (m) amides (n) nitriles. Write your answers on the back side of this sheet.  

Explanation / Answer

8.) The characteristic absorption bands in IR spectra for given parts are provided down:

(a) alkanes - 2950 - 2850  cm-1

(b) alkenes - 1680-1600 cm-1

(c) terminal alkynes-   2260-2100 cm-1 (weak band) with one additional band At 3100 cm-1

(d)  internal alkynes - 2100-2250 cm-1

(e) alcohols - 3600-3200 cm-1

(f) ethers - 1000-1300 cm-1

(g) primary amines - 3100-3500  cm-1 (two bands)

(h) secondary amines - 3100-3500   cm-1 ((one band)

(i) aldehydes - 1725 cm-1 (non-aromatic), aromatic = 1700  cm-1

(j) ketones -  1712 -1715  cm-1

(k) carboxylic acid- 1780 - 1710 cm-1

(l) esters - 1735-1750  cm-1 (C=O), 1000 - 1300 cm-1 (C-O)

(m) amides- 1640 -1690  cm-1 (C=O), 3100-3500 cm-1 (N-H)

(n) nitriles- 2250  cm-1

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