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Analysis of Multiple Compounds Using EIMS Spectra and Their Characteristics

This document presents a comprehensive analysis of various compounds identified through Electron Impact Mass Spectrometry (EIMS). A total of 11 compounds are detailed, including their molecular structures, mass-to-charge ratios (m/e), empirical formulas, and associated peaks. The comparison of mass spectra from different instruments provides insights into the structural features and potential applications of these compounds in organic chemistry. Special focus is given to the analysis of alkenes, diene behavior, and the degree of unsaturation across the compounds studied.

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Analysis of Multiple Compounds Using EIMS Spectra and Their Characteristics

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  1. Compound 1 P 100 % P+1 10 % 148/13 = 11.38; .38*13 =5 C11H18

  2. Compound 1

  3. Compound 1 C11H18 C10H14O Area : 5:2:2:3

  4. m/e 120 m/e 105 m/e 77 +. m/e 120 m/e 105

  5. Compound 2 P 100 % P+1: 7.1% P+2 : 33 % 126-35 = 91 91/13 = 7.0 C7H7Cl

  6. Compound 2

  7. Area: 5:2

  8. Compound 3 m/e 114 114/13 = 8.769; 0.769*13 = 10 C8H18

  9. Compound 3

  10. Compound 3 C8H18 C7H14O C6H10O2

  11. m/e 99 P-15 m/e 86 P-28 m/e 69 P-45 m/e 41 m/e 86 m/e 41 m/e 69

  12. Compound 4 m/e 184 184-79 = 105 105/13 = 8.077; 0.077*13 = 1 C8H9Br

  13. Compound 4

  14. Compound 4 Area 5:2:2

  15. Compound 5 m/e 75 C2H3O3 + C3H7O2+ m/e 73 C2HO3+ C3H5O2+ C4H9O+ m/e 147 = P - 15 m/e 130 = P - 32 CH4O m/e 115 = P – 47 CH3O2; C2H7O C8H18O3 mw 162

  16. Compound 6

  17. Compound 7

  18. m/e 136 136/13 = 10.46 0.46*13 = 6 C10H16 Compound 7 A comparison of two EIMS spectra obtained from different instruments and different samples

  19. C10H16 Compound 7

  20. C10H16 Compound 7

  21. Empirical Rules for Dienes (π → π*) Homoannular(cisoid) Heteroannular (transoid) Parent λ = 253 nm λ = 214 nm Increments for: double bond extension 30 30 alkyl subst or ring 5 5 exocyclic double bond 5 5 Alkenes ethylene λ = 175 nm λ = 253 +10 + 10 = 273 nm

  22. Compound 8 m/e 108 108/13 = 8.3077 0.3077*13 = 4 C8H12

  23. Compound 8

  24. Compound 8 d t d

  25. Compound 8 area = 2:2:4:4 left to right

  26. P : m/e 108 m/e 80 = P-28

  27. 1H NMR: no signal 13C NMR: 4 vinyl carbons

  28. 282/13 = 21.692; 0.692*13= 9 C21H30 C18H31Cl C15H32Cl2 C12H33Cl3 C9H34Cl4 C6H35Cl5 C6Cl6 35Cl = 0.76 37Cl = 0.24 1 1 1 n = 1 1 2 1 n = 2 1 3 3 1 n = 3 1 4 6 4 1 n = 4 1 5 10 10 5 1 n = 5 1 6 15 20 15 6 1 n = 6 n = 5 (0.76)5 = 0.254; 5(0.76)4(0.24)= 0.40 100% 157% n = 6 (0.76)6 = 0.193; 6(0.76)5(0.24) = 0.365 100% 189%

  29. Compound 9 P-28 146/13 = 11.23; 0.23 *13 =3 C11H14

  30. Compound 9 C11H14 C10H10O

  31. Compound 9 2 1 C10H10O C9H6O2

  32. Compound 9 160.63 S 153.99 S 143.48 D 131.79 D 127.95 D 124.43 D 118.81 S 116.70 D 116.56 D C9H6O2

  33. Compound 10 136/13 = 10.462; 0.462*13 = 6 C10H16

  34. Compound 10 Neat liquid

  35. Compound 10 C10H16 C9H12O CCl4 solution

  36. Compound 10 Area: 1:2:2:3 C9H12O C8H8O2

  37. 190.70 D 164.63 S 131.93 D 129.97 S 114.33 D 55.53 Q C8H8O2

  38. Compound 11 112/13 = 8.615; 0.615*13 = 8 C8H16

  39. Compound 11 C8H16 Degrees of unsaturation: 1

  40. Area: 3:2:3 C8H16

  41. 147.28 S 126.63 D 123.24 D 122.62 D 23.25 T 16.03 Q C8H16 C7H12O C6H8O2 Exact mass: 112.0347 Exact mass of C6H8O2: 112.0524

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