Propose a structure for the following: C₁H¹¹ 7.- IR: 1750 cm-¹ NMR 1.85 (t, 2H, J= 3.5 Hz) 1.92 (p, 2H, J = 3.5 Hz) 2.10 (s, 3H) 2.30 (t, 2H, J = 3.5 Hz) 7.10 (d, 2H) 7.25 (d, 2H) 9.34 (s, 1H)
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- Propose a Structure for the following: CnHiu O IR:1750 cm UMB 1.85 (t, 2H,J=3.SHE) 1.92 (p. 24, J=3.SHZ) 2010 (s, 3H) 2.3016, 2+1, 5= 3.5Hz) 7.10 (d, 2H) 7.25(d, 2H) 9.34 (s, 1H Please show all steps I have no idea what I'm doing and I'm Confused, thank you!!"Но LIGH + Cv (NO3)3 911₂0 ㅋ HH₂0, 120°C32904 24h ount B Used 0.839) - terephthalic and 09 Used 2,0g - Cr (103) 3 9H₂0Draw the structure of the important peaks in the mass spectrum of C9H8O (unsaturation = 6) Major Peaks: m/z = 132, 103, 77, 53
- A student takes an IR spectrum of an unknown compound. The IR spectrum shows significant stretches at 3159 cm³¹ (m, sh), 3089 cm ¹ (m, sh), 3000 cm ¹ (m, sh), 2997 cm-¹ (m, sh), 1620 cm-¹ (s, sh), 1494 cm-¹ (s, sh), and 1210 cm-¹ (s, sh). Which possible compound is it? Key: S = Strong, M = Medium, W = Weak, Sh = Sharp, Br = Broad Anisole Aniline O Acetanilide O Acetone O PhenolAspirin has several significant peaks in the FTIR. Match the most significant peaks below (in wavenumbers, cm ¹) with the bond to which the peak corresponds. HO₂C. 3100 (Broad) 1765 1690 1200 H₂C 2950 3050 C-H (sp2-carbon) C=O (ester) C=O (carboxylic acid) C-O O-H C-H (sp3-carbon) → + + + → →explain why C–O stretching occurs at 1100 cm-1 and C=O stretching occurs at 1750 cm-1
- The IR spectra of nonane (C,H20) and 1-hexanol (C,H13OH) are shown below. Assign each spectrum to the correct compound and identify the frequencies and the functional groups used to support your assignment. λ (μη) 6 7 8 9 10 11 12 1314 15 2.5 100 3 5 20 4 90 80 70 60 50 40 30 20 10 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 600 400 Frequency (cm¬') A (µm) 2.5 100 8 9 10 11 12 13 14 15 3 4 5 7 20 90 80 70 60 50 40 30 20 10 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 600 400 Frequency (cm¬!) (%) Transmission (%) Transmission8. a) Use the mass spectrum to determine the identity of the halogen atom (X) in the following molecular formula. 100 - C3H5XO2 80- 60 40 20- 152 154 20 40 60 80 100 120 140 160 180 200 m/z Relative Intensity15) Chemical Formula: CsH8O₂ 5x2=10+2=12-8=4/2=2. IR: strong peak 1720cm-¹, 1650cm-1( hard to see but, all peaks that integrate to 1H are doublet of doublets) 5 1H 1H 1 3 3H PPM 3H −2 0
- Which of the following molecules produced the 1H NMR spectrum shown below? (key: s = singlet, d = doublet, t = triplet, q = quartet, sept = septet, dd = doublet of doublets, br = broad singlet, m = multiplet) 2H, q 1H, q Cil 1H, br PPM 8 A. B. C. D. 2H, d 2H, d MeO 7 6 OH OH 3H, d 2 3H, tOH O B Compound (A or B), IR frequency or range of frequencies: cm-1Molecular formula: C10H1802 ¹H spectrum 1H, t J = 6.2 Hz 13C spectrum 180 160 2H, d J = 6.2 Hz 140 120 PPM 100 PPM 80 3H, s 60 3H, s 9H, s 40 20