Final answer:
The H-NMR chemical shift range for an alkene is typically between 4.6 ppm and 7.5 ppm, and it can be influenced by neighboring atoms and functional groups.
Step-by-step explanation:
The H-NMR chemical shift range for an alkene typically occurs between 4.6 ppm and 7.5 ppm. The chemical shift value is influenced by factors such as the neighboring atoms and functional groups. For example, the presence of electron-withdrawing groups can cause a downfield shift, while electron-donating groups can cause an upfield shift.
Here are a few examples of H-NMR chemical shifts for alkenes:
- d 5.41 (s, 1H) in isomer B
- d 6.15 (J5.2) in anomeric protons
- d 7.28-7.46 (m, 5H, Ph) in isomer A