Vanillin is the major flavor and scent compound isolated from vanilla beans. In addition to it's use in foods and beverages it is a versatile staining reagent for Thin Layer Chromatography. но ÓCH3 vanillin TMS 10 9. 8. 7 2

Propose a structure that is consistent with the following 1H NMR spectra. In each case, the molecular formula is provided. For spectra with numbers at the bottom of the signal you will need to determine the integration, others with numbers above the signal integration has been determined for you.

It ask that I use a rulet to determine the Rf values for each dye in the mixture. Is this correct? Also explain why all the Rf values should be between 0 and 1?

Write essay on the three proofs for identification of Unknown for the benedicts test, DNP test and Tellon's test and include how benzaldehyde becomes final result. Describe the three proofs for identification  of Unknown to determine benzaldehyde as end result. Explain three proofs of identification in detail writing for benzaldehyde.

Use equations to explain the prominent peaks at m>z 74 and m>z 87 in the mass spectrumof 2-methylpentanoic acid

The intensity of M+, M+1, and M+2 peak are 100.0, 6.8, 31.9. How many carbons are in the compound? (whole number digit only) 100 MS-NW-5495 80 60 40 10 20 30 40 50 60 70 80 90 100 110 m/z Relative Intensity 20

Please help identify all the peaks of the NMR spectrum and the assignments of the compound, 1-(2-naphthyl)ethanol

Question 11. Answer the following questions towards the identification of an unknown compound given the MS, IR, ¹H and 13C NMR spectra. MS IR LOD 100 80 Relative Intensity IKANSOLITAMLETZT 60 10 20 20 0 10 -20 30 40 -8 50 M+* = 116 = 60 70 80 ge 90 100 110 120 m/z D 4000 3000 2000 1500 1000 500 HAVENUMBERI -11

will be the pattern of the molecular ion peak(s) in the mass spectrum of 3-chloro-methyl-benzene (m-chloro-toluene). M+ at 126; largest peak at 76 M+ at 128; M+2 at 130, ratio 3:1 M+ at 128; M+2 at 130; ration 1:1 M+ at 128 M+ at 126; M+2 at 128, ratio 3:1 QUESTION 14 In a recrystallization, the solute is dissolved in solvent. cold room temperature hot QUESTION 15 Consider the aromatic compound 4-isopropyl-benzonițrile. (Benzonitrile is a benzene ring with the nitrile group on position 1.) How many for non-equivalent types of protons will be in its proton NMR spectrum? 4. 6

Intrpt as many of the main peaks in the following spectra as you can No handwriting ok