Question

need help with questions 1 and 2

NMR is a useful tool for differentiating isomers. For the following compounds, predict the number of 'H NMR and C NMR signals. (Do not include the H on the OH groups in your prediction.) OH НО. ОН ОН OH OH OH TH NMR 13C NMR Assign the stereochemical labels (R or S) to the indicated atoms on pseudoephedrine hydrochloride, an over-the-counter decongestant medication. НОН CH3 HN-CH, c HH The 'H NMR and C NMR spectra for a molecule with the formula C H12O2 are shown below. What is the structure ? Integration and splitting are noted. 19H, s

Answer 1

Q-0For the following isomers, predict the number of 11 NMR and 13C NMR signals (Do not include the H on the on group in your precluction) HQ OM О и pH, Bunu 13c, ast? Bon 3 14- T oll & " 13, CHE I > ' T 13 inch BC, 1 H 34" Belnah y some 3 3 13C NMR | ] [3 7 24 ] [4] [2] 2 Assign the Stereochemical tabels CROUS) to the indicated atom on pseudoephedrine Hydrochloride. on V ŽP3 322 in R75 riority: N.) C-on) EN₂> w Peposity: N. o nyno. pored bail priority on>E-N> Phenylon As the lowest priority group . (M) on the up side the configuration reverse from R or to's, so it is s festaboth configuration as o delikatne 55 l

Q.3). The In NMR & B C NMR spectra for a molecule - with the the formula formula C H2O2 C H iz O are shown below. are Ars What is the structure? Cintegration & spliting noted) molecular formula is cotizo? * The H NMR spectra indicate that there are only 2 types of proton, at around 3H (S) at around 3.8 ppm which near to oxygen an(s) at around 1ppm which near to carbon atom atom. * The BC NMR specta indicate that there are only 4 types of carbon. 180 ppm 13c peak ii's for estes Carbonyl → 50ppm 13c peak is for carbon near to oxygen i to-c43) → 40 ppm 13c peak is for carbon saturated carbon 25ppm 13 c peak is for 3 carbon atoms of Similar environment. so the structure is shown below is matching with NMR Data given. ochz chz c13