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- Following is the mass spectrum of an unknown compound. The two highest peaks are at m/z 120 and 122. Suggest a structure for this compound. (Data from http://webbook.nist.gov/chemistry/.)Aspirin 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) → + + + → →4 Write one sentence What peak pattern would you expect for the molecular ion of 1,1-dibromoethane?
- What structure is consistent with these spectra? 8. 6 PPM 12 10 8 4 2 200 160 140 120 100 PPM 180 80 60 40 20 OH HO, HO.19. Draw the structure of the cation which gave the base peak at m/z = 57 in d. Don't put the cation in a bracket. H C Marvin JS by ChemAxon S F + P [글 D +Determine the number of equivalent proton(s) associated with # 3 predicted peak.
- Which structure is consistent with an [M] peak and an [M+2]" peak in the ratlo of 3:17 Click on a letter A through C to answer, А. Br CI В. NH2 С.How many carbon atoms are present in a molecule which gives an M+1 peak that is 11.48% of the intensity of the molecular ion? Please explain.Q8.How many peaks will be observed in the low-resolution proton n.m.r. spectrum of (CH,),CHCOO(CH,),CH,? A 4 В 5 D 7
- -·|· 4.0 Match the peaks in this spectrum with hydrogens on the structure below. A) I: 0.91 ppm II: 3.29 ppm III: 1.52 ppm IV: 3.23 ppm H3C | 3.0 || H₂ CH3 CH CH3 III IV 2.0 ppm 1.0 B) I: 0.91 ppm II: 3.29 ppm III: 3.23 ppm IV: 1.52 ppm C) 1: 3.23 ppm II: 3.29 ppm +Please use a computer program to illustrate and/or type out the explanation. This cannot be hand drawn! If it is hand drawn your answer will be marked as wrong.How many peaks can be expected in the 13C spectrum of acetylsalicylic acid (shown below)? 1 2 C THO. 7 9. +/- х 100