5 Compound I has molecular formula C₂H₂ C10 and show a strong absorption in its IR spectrum at 1790 cm). ? Which one of the following could be compound ? Cl -of b) year امشه
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- Molecular Formula: C7H10O IR: Only notable main absorptions is at 1710, 2945, and 3100 cm-¹ ¹H spectrum 1H, s 13C spectrum 200 180 160 140 3H, s 2H, t J = 7.1 Hz 2H, d J = 7.1 Hz dr 2H, t J = 7.1 Hz PPM 120 PPM 100 80 60 0 I T 40 20The 1H and 13C NMR spectra of compound A, C8H9Br, are shown. Propose a structure for A, and assign peaks in the spectra to your structure.When measured on a spectrometer operating at 200 MHz, chloroform (CHCl3) shows a single sharp absorption at 7.3 δ. (a) How many parts per million downfield from TMS does chloroform absorb? (b) How many hertz downfield from TMS would chloroform absorb if the measurement were carried out on a spectrometer operating at 360 MHz? (c) What would be the position of the chloroform absorption in δ units when measured on a 360 MHz spectrometer?
- What is the structure from the formula C10H12O and the spectra?The 1H NMR spectra of three isomers with molecular formula C7H14O are shown here. Which isomer produces which spectrum?When the 1î-NMR spectrum of acetone, CH3COCH3, is recorded on an instrument operating at 200 MHz, a single sharp resonance at 2.1î is seen. (a) How many hertz downfield from TMS does the acetone resonance correspond to? (b) If the 1î-NMR spectrum of acetone were recorded at 500 MHz, what would the position of the absorption be in î units? (c) How many hertz downfield from TMS does this 500 MHz resonance correspond to?
- These are the 1H RMN and IR spectrums of an A compound with formula C10H13NO2. When A reacts with NaOH in water and heat, B compound is formed, with formula C10H11NO. What are the structures of A and B?15) Which compound does not have a strong, characteristic IR absorption near 1700 cm-1? B) (CH3CH2)20 C) CH3CH2CHO D) (CH3CH2)2C=OWhich of the following bonds would produce the strongest absorption? C=N C≡C C=O sp2C—H C—O
- 15. Which of the following absorption peak or peaks are the most helpful in identifying an ether compound? O The strong peak at 1400 cm-1 O Two medium peaks, one at 3300 cm-1 The broad stretch from 3500 to 2500 cm-1 The medium stretch from 3500 to 3300 cm-1A'2 The 'H-NMR spectra of cyclohexanol and cyclohexanone are given below. Identify which spectrum belongs to which compound and assign the peaks in each spectrum that substantiate your decision.Which of the following bonds would produce the weakest absorption? B) O-H C) sp³ C-H A) symmetrical sp C-H OC OOO D A D) asymmetrical spC-H