Unformatted text preview: ation of four carbon chain into an ethyl cation. 3. Explain why the mass spectrum of dibromomethane has three peaks at m/z = 172, 174, 176 in the approximate relative abundances 1 : 2 : 1. 79 Br and 81Br are the natural isotopes and exist in a one‐to‐one ration. Therefore, in a dibrominated molecule, the compound can display two 79Br, one 79Br and one 81Br, or two 81Br. The relative ratios are additive....
View Full Document
- Spring '08
- Recitation Worksheet, following mass spectra