2. How many distinct signals would you expect from the following molecules? Select the correct answer. B A C D A 1 2 3 4 5 6 ó ó ó ó ó ó ó ó B 00000000 C D OOOOOOOO OOOOOOOO

Briefly explain how the proton assignment is made in the diagram based on the position of signal

Label all peaks on this NMR of O-ethylsaccharin

Select the atom(s) on morphine that would show a signal on the DEPT-90 spectrum

Consider the following compounds, determine how many peaks would the circled protons be split into? CI H Br H H₂C CH3 H 11 OH ||| HJO-H Н C-CH3 Н

Chemistry H NMR AND C13NMR ??? IN 3 CI 5 A 20= B CI 7 9

What type of carbon environment does not generate a signal in the DEPT-90 spectrum and gives a positive peak in the DEPT-135 spectrum? O methyl methane O ethylene O carbony

For the structure shown, identify in a drawing the groups of homotopic protons and from these, the group with the lowest and the group with the highest shift values. Give an estimate for these shift values.

Which of the following compounds will show strong signals at 2250cm-1 and why?

Which of the following compounds will show strong signals in 2250cm-1 and why?