а Relative Transmittance 0.8 0.6 INFRARED SPECTRUM 3000 wwwp 2000 Wavenumber (cm-1) (https://webbook.nist.gov/chemistry) 1000 NIST Chemistry WebBook 1- For the above shown IR-Spectrum (Indicate the structure of the organic molecule). What are the characteristic peaks present?
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- Chemistry Assign each absorption between 4000 and 1500 cm -- to the corresponding functional group in the product. ACETIC ACID, 3-METHYLBUTYL ESTER INFRARED SPECTRUM 0.8- 0.6 0.4 0.2 3000 2000 1000 Wavenumber (cm-1) INIST Chemistry WebBook (https://webbook.nist.gov/chemistry) Transmitance100. 80- 60- 40- 20- 0. 4000 3500 3000 2500 2000 1500 1000 Wavenumber (cm) What information is available in the IR spectrum shown? A) It has a functional group of alcohol B) It has a functional group of amine C) It has a crboxylic group D) It has a benzene ring % Transmittance2. Determine the structure of a compound with a molecular formula of C6H120 and exhibits the following 'H NMR and 1°C NMR spectra. No peaks exchange in D20. | = 6 = 3 200 100 0.0 13 C NMR 1.1 1.0 | = 2 | = 1 %3D 2.6 2.5 2.4 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 1 H NMR
- Question 5 The infrared spectrum below is for a compound of formula CgH21 N. What is the most likely functional group this compound has? LOD TRANSMITTANCEI% 50 D 4000 O alcohol O primary amine O secondary amine O tertiary amine O amide Ⓒaldehyde O ketone O carboxylic acid O ester O monosubstituted alkene O cis alkene O trans alkene O trisubstituted alkene O gem alkene (R₂C=CH₂) O aromatic 3000 2000 m HAVENUMBERI -11 1500 1000 500QUESTION 3 Predict the IR absorption bands (peaks) observed in the spectrum of 3-methylcyclohexanone. sp3 C-H stretching (-2850-2960 cm 1) sp2 C-H stretching (-3000-3100 cm-1) Alcohol O-H stretch (-3300 cm-1, broad) C-O double bond stretch (-1700 cm-1) Aromatic out of plane bend for monosubstitution (690-710 and 730-770 cm-1). Aromatic out of plane bend for para (1,4) disubstitution (810-840 cm-1). Aromatic out of plane bend for meta (1,3) disubstitution (690-750 and 750-810 cm 1). Aldehyde C-H stretch (2750 and 2850 cm-1). Carboxylic acid (carboxy group) O-H stretch (-2500-3000 cm-1, broad) N-H stretch (2 bands at -3400 cm-1) N-H bend (-1600 cm*1) Aromatic C-C double bond stretches (-1500 and 1600 cm-1). Aromatic overtones (1667-2000 cm-1) O O O OElemental Analysis: 70.6% Carbon, 5.94% Hydrogen, 23.5% Oxygen Annotate the 1H NMR and IR spectrum. HDI Calculation? Chemical Formula? Proposed Structure?
- Determine the compound (name or structure) from the data. Explain features from each data Molecular formula: C3H8O -Use molecular formula to determine IHD -IR: Identify the presence/absence of five key functional groups -NMR: Analyze this last. Consider multiplicity and peak area to confirm compound -Structure?An unknown compound has the following data. Deduce the structure of the unknown compound and upload your answer. IF YOU DRAW MULTIPLE STRUCTURES, ONLY THE STRUCTURE WORTH THE LEAST POINTS WILL BE CONSIDERED. Molecular Formula: C10H120 13C-NMR data: there are eight signals 1H-NMR data: Chem. Rel. shift area 1.84 3.00 3.76 3.00 6.09 1.00 6.36 1.00 6.82 2.00 7.23 2.00 TMS 10 9. 8 7 3. 2 1 0 ppm Chemical shift (8) 6.5 6.4 6.3 6.2 6.1 6.0 IntensityWhen 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?
- QUESTION 1 The IR spectrum below belongs to an organic compound A having one nitrogen atom. Determine which structures that fits to the IR spectrum. Justify your answer by providing two (2) IR absorption peaks with their wavenumber. CN `NH2 Ahserbance /% 50- 100- 2000 Wavenumberrs/ cm 4000 3000 2F00 1F00 1000 F00the mass spectrum, IR and 13 C and 1 HNMR spectra for an unknown organic molecule. Determine the structure ofthe molecule.Q4/ Complete the following blank: (c 1- IR spectroscopy is most useful for identifying 2- H₂ doesn't give an IR spectrum because 3- The IR spectrum of an organic compound contain an oxygen atom, has no strong absorption from (1600 - 2600) cm¹ or any above 3000 cm¹¹, the functional group it is 4- The functional group has strong IR absorption bond between (1700-1750 cm¹¹) indicates TSS 5- In ¹H NMR spectrum 'H nuclei that are located near to electronegative atom tend to be to ¹H nuclei are not near to electronegative atoms. 6- Number of signal would be observed in the 'H NMR spectrum of the 3- hydroxyl -1-propene is relative