In 1H-NMR spectroscopy, three samples were examined: pure acetic acid, pure water, and a 1:1 mixture of acetic acid and water. Assuming rapid intermolecular proton exchange occurs, the number of signals/peaks observed for each sample would be respectively:

Consider the formation of triiodide ion I3−: I2 + I− → I3−. What is the correct relative order of the symmetric I−I stretching frequency νI−I for: (A) free I2, (B) I3−, and (C) I3− in an adduct with extra I− interactions?

Match the physical methods in Column I with the correct combinations in Column II (region/constant) and Column III (application): a. Electron Paramagnetic Resonance spectroscopy b. Nuclear Magnetic Resonance spectroscopy c. Resonance Raman spectroscopy p. Radio frequency q. Force constant r. Microwave i. nature of O2 bound to haemoglobin ii. d-block metals with odd number of unpaired electrons iii. fluxionality in organometallic compounds