Question

For each of the following compounds, determine whether or not you would expect its IR spectrum to exhibit a signal to the left of 3000 cm1: Yes, we expect a signal above 3000 cm-1. O No, we do not expect a signal above 3000 cm-1. Yes, we expect a signal above 3000 cm-1. No, we do not expect a signal above 3000 cm-1. Yes, we expect a signal above 3000 cm-1. No, we do not expect a signal above 3000 cm-1. C

Can you please explain how you got your answer? Thank you!

Answer 1

IR table sp C - H 3300 cm^-1 (> 3000) sp^2 C - H 3050 cm^-1 (> 3000 cm^-1) sp^3 C - H 2900 c m^-1 (< 3000 cm^-1) (a) Yes, we expect a single above 3000 cm^-1 (b) (sp^2 C - H absent) No, we do not expect a single above 3000 cm^-1 (c) (sp C - H absent) No, we do not expect a single above 3000 cm^-1 (d) sp^2 C - H at 3050 cm^-1 Yes, we expect a single above 300 cm^-1 (e) (sp^2 C - H absent) No, we do not expect a single above 3000 cm^-1 (f) sp C - H at 3300 cm^-1 Yes, we expect a single above 3000 cm^-1