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- What is the structure of the compound with the formula C10H14O, if it shows a strong broad IR signal near 3300 cm-1, the 1H-NMR spectrum is: 1.44 ppm (9H singlet) 4.97 ppm (1H broad singlet) 6.90 ppm (2H doublet) 7.32 ppm (2H doublet)What is the structure of the compound if M+ = 122, IR peaks 1500, 1600 and a strong peak near 3350 cm-1, the carbon-13 NMR shows six lines, the 1H-NMR spectrum is: 7.15 ppm (5H multiplet) 3.75 ppm (2H triplet) 2.75 ppm (2H triplet)Compound C has the molecular formula of C6H12O2 with the following IR data. The mass and NMR (1H and 13C NMR) spectra are shown below. IR (cm-1): 2800, 2950, 1710 and 1120 cm-1
- What is the structure of the compound with the formula C10H14O, which shows a strong broad signal near 3300 cm-1, the 1H-NMR spectrum is: 1.44 ppm (9H singlet) 4.97 ppm (2H doublet) 7.32 ppm (2H doublet)Identify an unknown compound C6H11BrO2 from a run on FTIR scan, 1H-NMR scan and finally MS scan on the compound, which are as follows:An organic compound B with formula C6H14O has the following: IR Spectroscopy 2974 cm-1, 1080 cm-1 Mass Spectrometry 102 (M+), 87, 73 1H NMR Spectroscopy Eight signals at δ 1.10 (d, 3H), 1.13 (dd, 3H), 1.14 (dd, 3H), 1.59 (ddq, 1H), 1.60 (ddq, 1H), 3.19 (ddq, 1H), 3.51 (dq, 1H), 3.50 (dq, 1H). Compound B is obtained by the reaction of compound A with NaH followed by CH3CH2Br. The stereochemistry of A is "S" Using this information, deduce a plausible structure for Compound A with correct stereochemistry.
- 2. Use the spectroscopic data provided below to answer the questions.a. Determine the structure of C5H8O from the IR and NMR data given.IR: 3023 cm-1, 1685 cm-1, 1619 cm-1. 13C-NMR: 7.9 ppm, 32.9 ppm, 127.7 ppm, 136.5 ppm, 201.1 ppm1H-NMR: 1.1 ppm (t, 3H), 2.6 ppm (q, 2H), 5.8 ppm (d, 1H), 6.23 ppm (d, 1H), 6.34 (t, 1H)b. Identify all of the Lewis acid sites and the Lewis base sites on your molecule.Predict the structure of the compound using the information below. From IR Spectra: Broad peak at 3500-3200 cm-1 Medium peak at 750 cm-1 From Mass Spectra M+ = 108 M+2 = 110 (with 3:1 peak ratio) From Proton NMR Spectra See attached picture.A compound of unknown structure gave the following spectroscopic data: Mass spectrum: M+=88.1 IR: 3600 cm-1 1ΗNMR: 1.4 δ (2 H, quartet, J=7 Hz); 1.2 δ (6H, singlet): 1.0 δ (1 H, singlet); 0.9 δ (3 H, triplet, J=7 Hz) 13CNMR: 74, 35, 27, 25 δ (a) Assuming that the compound contains C and H but may or may not contain O, give three possible molecular formulas (b) How many protons (H) does the compound contain? (c) What functional groups(s) does the compound contain? (d) How many carbons does the compound contain? (e) What is the molecular formula of the compound? (f) What is the structure of the compound? (g) Assign peaks in the molecule’s 1HNMR spectrum corresponding to specific protons.
- The infrared spectrum of the compound with the mass spectrum shown below lacks any significant absorption above 3000 cm-1. There is a prominent peak near 1740 cm-1 and another strong peak near 1200 cm-1. Propose a structure consistent with the data.Propose a structure consistent with following set of spectral data: C3H6O: IR peak at 1730 cm−1; NMR (ppm): 1.11 (triplet) 2.46 (multiplet) 9.79 (triplet)A compound used as a moth repellant has three molecular ion peaks at m/z = 146 (100%), 148 (65%) & 150 (10%) amu in its mass spectrum. A pair of smaller peaks are seen at m/z= 111 (34%) & 113 (11%). The infrared spectrum shows sharp absorption just above 3000 cm^-1 region, and also at 1480 cm^-1. The ^1 H nmr shows a single sharp signal at delta = 7.2 ppm, and the ^13 C nmr has two signals (delta = 133 & 130 ppm).