H-NMR 11 10 8 7 6 4 3 2 1 'H NMR (90 MHz, CDCI3) 6 7.87 (d, J = 8.5 Hz, 2H), 7.27 (d, J = 8.5 Hz, 2H), 2.70 (q, J = 7.5 Hz, 2H), 2.56 (s, 3H), 1.25 (t, J = 7.5 Hz, 3H).
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Hi, I have a question in relation to a proton NMR spectrum that is very similar to this one. Would the structure be 4-methylpropiophenone ?
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- The following 1H NMR peaks were recorded on a spectrometer operating at 200 MHz. Convert each into δ units. (a) CHCl3; 1454 Hz (b) CH3Cl; 610 Hz (c) CH3OH; 693 Hz (d) CH2Cl2; 1060 Hz3-Bromo-1-phenyl-1-propene shows a complex NMR spectrum in which the vinylic proton at C2 is coupled with both the C1 vinylic proton (J = 16 Hz) and the C3 methylene protons (J = 8 Hz). Draw a tree diagram for the C2 proton signal, and account for the fact that a five-line multiplet is observed.For each set of spectral data, propose an acceptable structure that is consistent with the data 1.. MS: M+ m/z=92 (M:M+2=3:1), IR: 2960, 2870 cm^-1, 13C NMR: 67.29 (C), 34.46 (CH3) ppm 2.. MS:M+ m/z=70, IR: 3070, 2960, 2870, 1666 cm^-1, 13C NMR: 138.92 (t), 114.26 (d), 35.96 (t), 22.17 (t), 13.59 (q) ppm 3.. MS: M+ m/z= 72, IR: 2960, 2870 cm^-1, 13C NMR: 31.68 (t), 29.80 (d), 22.20 (q), 11.69 (q) ppm
- In which of the following systems is the energy level separation the largest: a.) a proton in a 600-MHz NMR spectrometer; where gI = 5.586 for proton b.) a deuteron in a 600 -MHz NMR spectrometer; where gI = 0.857 for deuteron (2H)The molecular formula of an unknown compound is C7H13BrO2, The strong peak at 1750 cm^-1 The proton NMR data is, 1.2d(6H, d), 4.2d(1H, t), 2.2d(2H, quintet), 4.93d(1H, septet),1.08d(3H,t).What is the name of the unknown compound? Isopropyl 2-bromobutanoate 1-bromopropyl isobutyrate ethyl 2-bromo-3-methylbutanoate 1-bromoethyl 3-methylbutanoateSpectra data for Unknown Z are listed below. Deduce it's structure. MS: m/z 134 (Molecular Ion) IR: 1720 (strong); 3062 (weak); 2981 (medium); 1605 (medium) 13C NMR and 1H NMR shown on a separate page.
- The NMR spectra for compound 1 were acquired in a 10 mg / 0.6 mL solution of CDCl3. The 1H and 13C peaks are also listed below.Provide a full analysis of the NMR spectra for compound 1.1H NMR (400 MHz, CDCl3) δ 5.94 (dd, J = 17.3, 10.8 Hz, 1H), 5.24 (dd, J = 17.4, 1.2 Hz,1H), 5.14 (tt, J = 7.1, 1.5 Hz, 1H), 5.08 (dd, J = 10.8, 1.3 Hz, 1H), 2.05 (p, J = 7.3 Hz, 2H),1.70 (s, 3H), 1.63 (s, 3H), 1.60 – 1.57 (m, 2H), 1.30 (s, 3H).13C NMR (100 MHz, CDCl3) δ 145.05, 131.98, 124.32, 111.69, 73.49, 42.06, 27.89, 25.71,22.81, 17.70.Note: from the data given, the two terminal methyl groups are impossible to differentia1. For each set of spectral data, propose an acceptable structure that is consistent with the data. a. MS: M+ m/z=71, IR: 3340, 2960, 2870 cm-1 , 13C NMR: 47.20 (CH2), 25.64 (CH2) ppm b. MS: M+ m/z= 102, IR: 2960, 2870 cm-1, 13C NMR: 72.73 (t), 23.20 (t), 10.80 (q) ppm c. MS: M+ m/z=74, IR: 3310, 2960, 2870 cm^-1, 13C NMR: 62.44 (down), 34.86 (down), 18.98 (down), 13.88 (up) ppm (DEPT-direction) d. MS: M+ m/z=92 (M:M+2=3:1), IR: 2960, 2870 cm^-1, 13C NMR: 67.29 (C), 34.46 (CH3) ppm e. MS:M+ m/z=70, IR: 3070, 2960, 2870, 1666 cm^-1, 13C NMR: 138.92 (t), 114.26 (d), 35.96 (t), 22.17 (t), 13.59 (q) ppm f. MS: M+ m/z= 72, IR: 2960, 2870 cm^-1, 13C NMR: 31.68 (t), 29.80 (d), 22.20 (q), 11.69 (q) ppm g. MS: M+ m/z= 84, IR: 2960, 2870, 1734 cm^-1, 13C NMR: 220.16 (C), 38.30 (CH2), 23.24 (CH2) ppm h. MS:M+ m/z= 138, (M:M+2=1:1), IR: ~3010(broad), 1715 cm^-1, 13C NMR: 173.61(s), 25.21(t) ppm i. MS:M+ m/z=88, IR: 2960, 2870, 1736cm^-1, 13C NMR: 170.95 (C), 60.34 (CH2), 20.98 (CH3), 14.23 (CH3)…300 MHz 1H NMR spectra in CDCl3 are shown below for five of the six isomers of dimethylphenol. Match each spectrum to the appropriate compound and assign the resonances of the spectrum to the appropriate protons in the compound.
- Isoamyl acetate is the primary component of artificial banana flavor. Which signals will be in the positive phase, negative phase, or nonexistent in normal 13C NMR, DEPT-90, and DEPT-135 of isoamyl acetate?Organic Chemistry - How many signals would you expect in the 1H NMR spectrum of HOCH2CH2CH2CH2OH?Draw the 1H NMR spectrum of the following compounds:-Show all chemical shifts and H assignments.-Show splitting patterns and coupling.-Show integrations.