透过率/% 100 20 D 12.1 Which compound is consistent with the spectrum shown below? 薄膜法 4000 1982 8B 26 1848 81 25 1645, 45 17 1463 29 14 1423 17 60 1348 49 81 1314 40 3000 44 1239 1181 74 1115 18 1028 993 918 7 888 GA 645 41 556 47 441 84 2008 a /cm¹ OH MM 1500 1000 500 OH b C d

interpret/identify the peaks and their characteristics. (ex. C=O, 4H, doublet) compound name: isopentyl acetate (C7H14O2)

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

Which compound is most consistent with the following mass spectrun 100 80 20 0mtrmmt 10 20 30 40 50 60 70 80 90 100 110 120 m/z OH II II IV V VI VII Relative Intensity 유

The answer is D, could someone please explain it

Please explain the process including the ppm of each peak, thanks!

When a sample of the compound below is analyzed by mass spectrometry, the molecular ion will appear at m/z = You should also expect to see significant peaks at and When a sample of the compound below is analyzed by mass spectrometry, the molecular ion will appear at m/z = You should also expect to see significant peaks at and 154 152 40 154 153 TIVITY 156 | When a sample of the compound below is analyzed by mass spectrometry, the molecular ion will appear at m/z = You should also expect to see significant peaks at • Jand 111 112 110 When a sample of the compound below is analyzed by mass spectrometry, the molecular ion will appear at m/z = You should also expect to see significant peaks at and 43 41 42

Name the molecule.

2

You have a unknown compound you need to identify - its El mass spectrum shows a peak at m/z=187 with an intensity of 84, and a peak at m/z = 188 with an intensity of 11. There are no peaks with m/z > 200. What does this %3D mean? The compound contains approximately 30 carbon atoms The compound probably contains a nitrogen atom The compound probably contains a bromine atom Not enough information to tell anything