Question

Determine how many CH2 and CH3, CH and C (no hydrogen) groups are in the molecule. and how many proton groups are there. Does the spectra agree with this?

Cholesterol in CDC13 Proton spectrum AAA M. T T 40 0.5 5 5,0 4.5 3.5 3.0 25 2.0 1,5 14 0 f1 (ppm) Cholesterol in CDC13 Carbon Spectrum ..demel. 135 130 80 10 50 145 140 125 120 115 110 105 100 95 90 85 70 75 f1 (ppm) 65 60 55 50 45 40 35 30 25 20 15 DEPT90 145 140 105 100 80 50 135 130 125 120 115 110 95 9C 85 75 70 f1 (ppm) 65 60 55 50 45 40 35 30 25 20 15 10 5 DEPT135 Cholesterol-expamded carbon spectra 11 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 f1 (ppm) 26 25 24 23 27 21 20 19 18 17 16 15 14 13 12 1 44 43 42 41 4D 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 1 fl (ppm)

Answer 1

ANSWER mly ignal gro will iow As We Knon: DEFT 90 CH DEPT 135- negetive white cH and ignals Frm CH2 will be CHa in pasitive on the study given Dept 70, Dept - 135 and 13 NMR specra I carsbons 22 Hydrn roups CH2 Hydgn 5 Carbans 15 5 grous cH3 Hydogen e Carsboms, 8 8 Tufos H 3 Carbans 3 The total numbes 44 potons presont in the given HNMR Pecka As pes he gien data Dept 9o 4 Deft 135 cholesternl Molewlar For H NMR1CNMR and this is the specra of chole storal- C27H46 mula rent in the cholestrrl g one oH The given specka agree with the above given data