Answer: option D) 1=B,2=A,3=C
Explaination:
Match the signal to the corresponding vinylic proton 2 13 He 7 Hb Ha 4 PPI...
Q2 Match each proton in the following molecule to its signal Ha, OCH3 7 5 2 6 PPM
For the protons labeled Ha and Hb in the structure below, predict the characteristics of their signals in the H NMR spectrum: the approximate chemical shift, the splitting pattern, and the integration value of their signals. Approximate Integration Splitting chemical shift value O 1H H NMR signal O 1 ppm O singlet for H O doublet O 2H 2 ppm O 3H O 3-4 ppm O triplet Br O 4H O 5-6 ppm O quartet O 5H O 7-8 ppm...
Page - 8 - of 9 B Solvent • ppm 8A) MATCH the proton (1H) NMR spectrum above to the CORRECT molecule (1, 2, 3, or 4). 8B) In the table below, ASSIGN each signal in the spectrum to the corresponding hydrogen atom(s) in the compounds. Use this format example: 3.0 ppm ЗН singlet (fictitious) -CH SIGNAL ppm (x scale) Integration Splitting Assignment A B с D E
2.
The protons marked Ha and Hb in the molecule below are:
A) chemically equivalent B) enantitopic C) diastereotopic D)
endotopic E) none of the above
3. Predict the number of signals expected in the 13C NMR
spectrum of the compound shown below.
1, 2, 3, 4, or 8
7.
12.
1. Pof the compounds below, complete questions 1A-1C. Example: ethanol HD, Hb O-Ha COM He Ho 3 unique set of H's A) For each compound, predict the total number of signals you expect in the 'H NMR spectrum. Provide the number of signals by labelling H's as H, to H, acronym system (see example above). Use the same subscript for those H's that are chemical equivalent. B) For each compound, order all unique proton signals from lower to higher frequencies...
answered Points out of 10.00 Og proton transfer Flag question H2 cyclohexanol pH 4-6 hemiaminal or aminoalcohol step 2 step3 HN HN HN H* он H* hemiaminal or aminoalcohol The optimal pH for condensing an amine with a carbonyl group to give an imine is about 5-6 What step/s of the proposed mechanism would be slower at LOWER pH? Give you answer in a form: 1,2,3,4,5,6 Consider "H NMR spectra Fig. 17.4 and Fig. 17.8 (textbook) and structures of cinnamaldehyde...
Match the hydrogens in the structure below to each signal in the NMR spectrum H1 H5 H4 tra -H3 6H E 6H, singlet B 3H, singlet D 2H, singlet с 1H, septet F. 6H, doublet A 4H, mult 8 7 6 5 3 2 1 0 4 PPM
Please answer all. Just need A,B,C or D
2. (01') Which proton has the lowest pKa value (This is Elvitegravir an HIV drug)? На CI O2Hd A) Ha B) Hb C) Hc D) Hd 3. (Q1) Which is the major product in this reaction? 1) Sia28H-THF 2) H202, NaOH C) D) но он 4. (a1') What is the hybridization of the nitrogen atom in the following structure? NH A) sp B) sp C) sp D) sp
2. Consider a periodic signal shown below (20 points) i(t) -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 (a) Find the fundamental period of this signal. (b) Consider following two signals, xi(t) and x2(t), obtained from the above signal, find their corresponding Fourier transforms: xi(t) -1 0 1 *2 (1) Its of, 0 1 2 3 4 5
match the reactin from column A to column B
con nom GORE COLUMNA COLUMNB O 2 A) 1) NHL H,504 LAB B) ? C) 1) MCN 2,0 0 2) OH D) SWC, HCI 3) E) NH F) o 요 H,SO Na 4) G) H) HNO3 HS), 5) PCC 0) 6) o- J) 1) excess (CH2CH2), THE 2H30 OH ? 7) ות ОН ? 1) excess (CH3CH2Cai, THE 2) но" 7) Н NaBHA К) о 8) ? о 1) PB<3 ?...