Problem 6.1

a) Write down the structures of some molecular ions. Locate the charge at the most preferable position.

  • 1-butene
  • ethyl-isopropylether
  • pyridine
  • ethyl acetate
  • 2-dimethylamino-diethylsulfide
  • trifluoroethanol

b) What is the statement of the even-electron rule?

c) What is the statement of Stevenson’s rule?

d) Where will the charge reside according to Stevenson’s rule? Write down the structures of the prefered fragment ions upon cleavage of the bonds indicated below (Table 6.2 might help):

Molecular ion cleavages

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