Question

3. For the following molecules perform the following: (4 pts each, 8 pts total) A. Use the molecular formula to calculate the DU B. Using the IR spectrum fill in the table below, identifying the significant peaks, their wavenumbers, their shape, their intensity, and the bond type the peaks represent. For peaks that represent the same bond type you may place them in the same row. (i.e. 2964, 2934 cm-1, sharp, strong, sp3 C-H) C. Using all of the information determined from above draw two different possible structures. Remember the structures have to be consistent with ALL the information. CoHBRO LOD D 2000 4D00 3000 1500 1000 500 HAVENUMBERIl 1236 2938 2849 1366 28 1069 92 874 62 4 49 8 1226 18 32 39 1344 50 57 6D 39 49 1051 863 852 786 671 S8 TT 49 1205 1191 1174 1034 976 936 AT 41 464 466 440 26 1332 53 1306 1279 60 39 44 57 420 43 1272 1262 1121 52 7 921 37 896 36 657 34 680 66 1089 377 44 47 DU: wavenumber bond type shape intensity (cm-1)

Answer 1

Answer 2 In major only consider shore and IR. we peak. 2: 05 CGHI Bro CnH2n+2=C6H14 2H 24 D.U. = 1 The I'R chart ware number 2964 cm 2934cm' Shope sharp intensity strong | bond Tape sp3 c.H 2. 1466 cm 1440 cm 1420 cm Geek sharp I weak Br-of-hondine 1366 cm 1344cm shap strong sp3. 0- 1272 cm 12 30cm

I weak. C L 1174 cm 1121 cm 1 sharp 10. 89 cm 103 cm sp3 -c-d saturated alkane. Sharp strong 976 cm 921 cm 874 cm - -x sp3 796cm 671 cm 680 cm broad weak ortho substituted ring.