A compound containing one functional group has IR absorption bands at 3300 cm1 (strong, sharp) and 2150 cm¯1. Which substance best matches this information? A) hexan-2-one B) hexan-3-ol C) hex-1-ene D) hexane E) hex-1-yne
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- 2) For each of the following pairs of compounds, name one absorption band that can be used to distinguish between them. State what the bond is (bond order, between which 2 atoms), and approximately where it appears in the IR spectrum (in cm ¹). b) HO 1-hexanol OH phenol H₂N 1-butanamine ethyl acetate cyclohexane OH hexanoic acid LOH cyclohexanol NH₂ butanamide diethyl ether cyclohexeneCH3 c=C H3C H.1. Predict the approximate positions of all of the important absorptions in the IR spectrum of this compound. wwwww ww CH;CH2CH=CHČOH 2. Explain which functional group is present in the compound with the following IR spectrum. Show a possible structure for the compound. C6H10 NEAT 400 400 200 4000 300 300 3400 31200 3000 2900 2600 2400 200 2000 1800 1600 1400 1200 1000 WAVENUMBERS
- A compound containing one functional group has IR absorption bands at 3300 cm-1 (strong, sharp) and 2150 cm-1. Which substance best matches this information? A) hexan-2-one B) hexan-3-ol C) hex-1-ene D) hexane E) hex-1-yneIdentify the significant absorption peaks by labeling them right on the spectrumand includethe spectrum in your laboratory report. Absorption peaks corresponding to the followinggroups should be identified: C—H (SP3) C—H (SP2) C—H (aldehyde) O—H C=O C=C (aromatic)aromatic substitution pattern C—OC—X (if applicable)Obtain the IR spectrum of your product. Draw your product on the spectrum and identify two IR absorptions that let you know that you have formed your product. Make sure you indicate what functional group is creating the absorption. Show everything on the spectrum. We get signals for anthracene in IR Spectra, ~ 3000cm-1 :sp2 CH stretch (aromatic) ~ 1620 cm : C=C stretch (aromatic) For maleic anhydride: Stretching band of maleic anhydride at 1856 cm-1 (low intensity) and 1780 cm-1 (medium intensity) and a band at 1707 cm -1 due to the C=O. Peak at 3000-3100 cm-1 is due to C-C
- Which functional group might be present in a compound if it shows IR absorptions at 1715 cm-¹ and 2500-3100 cm-¹ (broad)? A) alcohol B) ether ester D) carboxylic acid E) aldehydeHow many different 13C-absorption lines and how many 'H- resonances (disregard splitting and assume that solvent exchange of acidic hydrogens does NOT take place) are observed in the spectrum of each of the following compounds? (H3C)3C-C(CH3)2 CI A H3C (H3C)3C B CH3 CH3 H₂C= -COOH C CH-CI H3C-C-CH Cl Br DQ3. The following spectra belongs to either benzoic anhydride, aniline and phenol. Identify and describe the important absorption in the spectral data shown below. 4000 3440 1979 1 217 3310 9 1000 19 1979 1 3460 44 2906 06 3396 58 2630 84 320984 1918 1 30954 72 OL FLOE 1340 06 1325 79 1300 79 1276 20 103900 182605 1174 47 106904 1028 72 10 966 616 64 640 1 86 929 3041 32 1500 4 115499 2013 00 1400 60 1117 79 C0031 a PIR 1000 Wild PUBERGH 1500 1000 100 Whe
- 9) What would be the difference between the 4 alcohols in IR? They all show O-H, C-H sp3, and C-H aromatic bonds. The only way to tell which one is used would be by comparing the fingerprint regions to published IR spectra of each alcohol. Alcohol 2 has an aldehyde C-H group that could be seen between 2700-2800 and 2800-2900 cm-1 Only alcohol 3 will show O-H bond around 3300 cm-1 Only alcohol 1 will show C=C aromatic bonds around 1600 cm-1 10) Assuming 5.0 mL of alcohol 2 was used and 2.2 g of the product was isolated, what is the percent yield for this reaction? The product has a molar mass of 198.00 g/mol. 11) How could the percent yield be increased for this reaction? Add NaOH to neutralize the product as it forms Add a catalyst such as H2SO4 to help speed up the reaction Add a catalyst such as HCl to help speed up the reaction Cool the reaction on ice to increase the rate of reaction 12) Is there another way that the product of this reaction…IR Spectrum Directions: Identify the major IR absorptions. Once you have deduced the structure of the unknown, write the name of the unknown compound. Observe and Explain why it happened.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 Ahsorbance / 4 50 100- 4000 3000 2500 2000 1500 1000 500 Wavenumbers / cm