Question

7. Which compound below be H-1 NMR 0.9 ppm (quartet fits the following spectral data? (6 points) 1.2 ppm (sextet 2 hydrogens), 2.1 ppm (triplet, hydrogens), 4.3 ppm (singlet 3 hydrogens) C-13 NMR 5 signals 25 ppr ppm (CH2); 61 ppm: (CH3) 198 Ppm (C). IR strong peak 1735 cm Ignals 25 ppm (CH): 35 ppm (CH2), 46 ppm (CH2); 61 ppm: em Mass Spee parent M+ = 102 Mass Spec paren ou 0 H2 CH3 HjC Holo H3C- CC Hochg-co-CH: Нco-ce-CH, 4 CH spectra of the 8. How many signals would you expect to see in the broadband decoupied following compounds? (6 points) see in the broadband decoupled C 0-c-0- CI H2CH. CH, H, HC.CH.CH H.c-C-o "CHE H =C-CH3 NH If a proton gave an NMR signal at 3.2 ppm on a 60 MHz NMR, what would the chemical shift be of this proton (in ppm) if the sample was run on 400 MHz NMR? (5 points)

Answer 1

The compand hased on data is faud to lej juen ]1 .CHr CH 2 (serter 2.1 O.9 ppm (S) (a) 3ppm Singlet is the charautshie ak ef-0-Cts s we heached to onlusien thab B is the Lorrect stuctune

CNMR 35 CHr CH CH3 25 61 46 198 IR 7 35 cm :4signal 4Signals 7 Signals 2 2 2 Sgnats 4 signals Proton gara, 32 Ppm on 60NHZ operating frayany (Mte S-Valua hemain Aame 3.2= b0 Aample hun on yoo MHz =1280H2 3-2- V Thus aries and not&-valu. S3.2Ppm