Question

need help on what compound it is

20 60 V 25 24 %T 40 3000 1000 20 4000 600 2000 Wavenumber [cm-1) 7 [Result of Peak Picking) No. Position Intensity No. Position 1 605.539 29.43332 637.358 5 925.664 53.82756 943.985 9 1038.48 27.7647 10 1107.9 13 1367 28 28.5145 14 1379.82 17 17443 22.2588 18 2064.42 21 2728.78 63.3586 222876.31 Intensity 41.8564 54.08 57 2549 27.473 69.7798 32.6653 No. Position 3 824.42 965.198 111180.22 1 5 1395.25 19 2149.28 23 2965.02 intensity 58.5799 54.8952 46.0941 33.5265 68.6906 28.1228 No 4 8 12 16 20 24 Position 905.415 990.268 1238.08 1472.38 2479.04 3463.53 intensity 49.6782 42.0065 21.4239 31.6772 69.1763 57.1347

Answer 1

1H NMR data:

NMR peak value (ppm)	Protons	Indication
3.8	2H, doublet	CH2 attached to oxygen
2.0	3H, singlet	CH3 attached to carbonyl
1.9	1H, multiplet	CH attached to two CH3
0.9	6H, doublet	Two equivalent CH3 attached to CH

13C NMR data:

NMR peak value (ppm)	Indication
170	Carbonyl carbon, ester
70	Carbon attached to oxygen
27	Aliphatic carbon
20	Aliphatic carbon
18	Two Aliphatic carbon

IR data:

IR peak (cm-1)	Indication
2873	Aliphatic C-H
1744	C=O stretch Probably ester
1238	C-O stretch

All above data confirms following structure

isobutyl acetate