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17) Which of the following ions gives a peak in the mass spectrum of 1-butanol? A)...
Which of the following statements is true for the peak in a mass spectrum that corresponds to the molecular ion? a. It has the highest m/e value of all the peaks in the spectrum b. It has the largest peak height in the spectrum c. The m/e value corresponds to a very stable carbocation d. The m/e value equals the molecular weight of the compound
16 What is the structure of the compound that gives the following infrared spectrum? 1UU T80 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers CH 17. Identify the molecule that gives 3 sets of protons in NMR spectrum. ii) CF13-CO-O-CH2-CHs ?) CH iv) p-chlorotoluene 112-CHa iii) C113-@c1 13 IV i and iBi and iv C. only D, i only A. i and iii B/ii and iv E. iv only 18. Identify the possible region for -OH absorption A. ~1500...
3/26/2020 Name! 1. Which of the m/z values correspond to the molecular ion for the following compound? a. 18 b. 82 C 102 d. 103 2. Which of the m/z values correspond to the molecular ion peak in the following mass spectrum? 100- Intensity miz a. 45 c. d. 29 15 3. Which of the following will produce an M** and an (M+2)** of the same intensity? a. Nitrogen b. Chlorine c. Bromine d. lodine 4. Which of the following...
Give one fragment in the mass spectrum and one peak in the IR spectrum that could be used to distinguish between these two isomers: Give one fragment in the mass spectrum and one peak in the IR spectrum that could be used to distinguish between these two isomers: CH O CH (O H3C H3C H3C CH 3,3-dimethylbutanal 4-methylpentan-2-one (Designate which compound will show that diagnostic fragment or peak by preceding the value with the letter of the compound, i.e. "a47"...
ROSCOPY Which of the following gives only single peak in 1ts proton NMR spectrum? A. tert-butyl bromide B. 2,3-dimethyl-2-butene c. (E)-2,3-dibromo-2-butene A, 3, and 1) A andB 3) 3 andc 2) A and C
14-What is the structure of the compound that gives the following Mass spectrum a-Chloroethane b-Bromoethane c- Nitroethane d-Phenol 15.The correct order for the basic features of a mass s a-acceleration, deflection, detection, ionisation b-ionisation, acceleration, deflection, detection c-acceleration, ionisation, deflection, detection d-acceleration, deflection, ionisation, detection 16. What is the structure of the compound that gives the following infrared spectrum? a-Ketone b- Alcohol c-carboxylic acid d- Aromatic 17. What is the structure of the compound that gives the following infrared spectrum?...
(20) Which of the following compounds gives an infrared spectrum which peaks a 3000-3500 cm, and \700 cm он (3) С? А? D? В? Qi) a compound with the molecular formula C3 Hia gave the following HNMR spectrum Singlet 81.0 (12H), the structure of the compound is СН3 снасна с насиз © сHз сHсна са сH 3 CH3 Cha СН3 CH3CH ® CH₃CCH3 снасна сна
1) Which compound gives the following spectra? For the 'H-NMR assign all signals. Interpret mol peak and base peak in the mass spectrum if a mole peak exists. Assign at least two 13C signals (8 pt) How does the IR spectrum support your findings? s, 3 H s, 3 H dd 1 니 d, 1 H s,1 H d, 1 H 8 7 6 3 2 0 ppm LOD sDo し000 5 Dd 4000 HAVENUNBERI-1
Question 12 Which of the following is not prominent in the mass spectrum of 2-methyl-2-butanol? a. M-21 b.M - 29 Oc. M- 15 dM 18
14. An unknown compound shows an intense IR absorption at 1710 cm- and gives the following NMR spectrum: 8 1.1, doublet, 6Hs; 8 2.1, singlet, 3Hs; and 8 2.3-2.8, broad multiplet, 1H. Which structure is the compound? a) (CH3)2CHOCH3 с) CH:C-O)CH-CH-CH3 ect r b) CH3CH2CH2OCH3 d) (CH3)2CHC(O)CH3 15. This NMR spectrum corresponds to which compound? 2H 1H 1.7 ppm 1H O.5 1.5 1 2 2.5 3.5 4.5 4 5 бн (рpm) b) CH3CH2CH2CH2OH d) CH3CH2CH(OH)CH3 a) (CH3)3COH c) (CH)2СHCH,ОН 13