Question

Given this IR Spectra of an unknown compound, how do I determine the structure of what I have?

I think I have some sort of ketone? Possibly a methyl ketone.

Attached is also the H-NMR. Please help determine structure of unknown.

the only other information i have is that it has a low molecular weight and is neutral

120-pennifers Gr own#1 110 100 80 70 60 50 40 30 20 4000 3500 3000 2500 2000 1500 1000 Wavenumbers (cm-1) ue Apr02 08:20:55 2019 (GMF07:00) ND PEAKS Spectrum: Region: Absolute threshold: 118.031 Sensitivity: Peak list Jennifer's Green Unknown #18 4000.00 400.00 50 Position: 727.00 Intensity: 98.665 Position: 902.13 Intensity: 101.932 Position: 963.33 Intensity: 99.671 Position: 1110.21 Intensity: 103.819 Position: 1170.32 Intensity: 67.167 Position: 1240.99 Intensity:95.478 Acquisition and Processing Parameters g greern delete Acquisition Time: 2019-04-02 2019/04/02 10:45:11+0800 Solvent: Chloroform-d TX Frequency: 59.69 MHz Scans: 16 Time Per Scan: 4.4 sec Spectral Width: 12 ppm Dwell Time: 0.34 us enter 3.00 1.89 3.15 refum 2.24 Digital Resolution: 0.05 Hz NPoints (Complex): 2048 Zero Filling:7 Apodization: 0.10 Receiver Gain: 17 Pulse Width: 13.3 us shift Peaks: 1: 37 Hz (0.63 ppm) 2: 45 Hz (0.76 p : 51 Hz (0.87 4: 59 Hz (0.99 ppm) S: 75 Hz (1.27 ppm) 6: 82 Hz (1.38 ppm) T: 90 Hz (1.51 ppm) 8: 96 Hz (1.62 ppm) 9: 117 Hz (1.97 ppm) 10: 127 Hz (2.14 ppm) 11: 134 Hz (2.26 ppm 12: 141 Hz (2.38 p 1 PPM 0.5 PPM 2 PPM 2.5 PPM 1.5 PPM

Answer 1

Fmom the IRSpectva, the Compound srous, Peaky at about 964 cm" ) 877 cm. 1) 1-1 I 6 emT) 1487 410 ovi, 1365 em, 12T4 em, 124em, 121 om -c stneching is in the veaion 1000-1200 c 1I1 10 cm, ITom Comes cunelehis vegior CH in katone , comes in the reaion 168o-1750em 0 negion.。。。 "The peak at 1-1 loen"I Comespondi Thus by evaluating the IR Specetra, the compar may contain keto * From NMR Spectra. A Triplet at 0g ppm A singlet at in bpre at 3 A senctet at 1.5 Ppm B Evaluating, the IR 3 NMR spectva the sterceture ofd the compound ta may be Pentan-2-one