8. In each molecule shown below two protons are clearly identified. Determine which one of the...
In each compound below, two protons are clearly identified. Determine which of the two protons is more acidic. он н . NH2 Но (a) (b) (c) SH но (d) (e) (f) H но ОН (h)
10 because it has resonance. 3 b) For the following molecules, two protons are identified. Determine which proton is more acidic and explain how you determined. (5 pts each) SH acidic because it has a longer 1 HO 2 is more parant chain CF N 2 it has a longer is more acidic because parent chain IZ ☺ Because of induction CF3 puling on N
8. Circle the most acidic one among the hydrogens shown in each molecule below.
1. How many non-equivalent protons are there in each of the molecule below? Label them (a, b, c, etc.) (0.3 pr, 0.23 pt each) B. CH3-CH=C=C-H CH3 epen 2. Predict the chemical shifts of all the labeled protons (Ha, Hb, Hc, Hd) in the structures below. Please note that the labeled protons could represent one or more equivalent H's. (1 pt, 0.5pt each) Hint: use the table below. TABLE 13-3 Typical Values of Chemical Shifts Type of Proton Type of...
with one another? no loan pais 1. For each compound shown below, number the illustrated protons according to their acidity: most acidic (1) to least acidic (3). (9 points) H H NH2 H OH HO F F OH O HS OH 13. Shown below is the formal structure of the amino acid methionine and its structure as it exists at physiological pH ( 7.3). In each case, the molecule itself is neutral; however at pH 7.3 there is an atom...
Consider the indicated protons in the molecules shown below. Circle the molecule with the lower pK, and explain your choice with an appropriate drawing. NH ZE OH оме Но, . Meo b) Ho Ho (Rationalize with a one sentence explanation.) d) Rank the following molecules in order from least acidic to most acidic. Rationalize your choice with an appropriate drawing.
1. [2 pts] Identify which signal on the proton NMR is produced by which proton or set of protons in the molecule shown. Assign protons a-e to the signals. 3 2 PPM 0 2. [2.5 pts] Evaluate the following proton NMR and determine which compound produced the NMR. Circle the answer and indicate one reason why each of the other answers must be wrong. Be specific in your reasons PPM Br Br Br Br Br CH3
8. The structure and proton NMR spectrum of a molecule are shown below. The molecule has letters by each location that has one or more protons. The chemical shifts of the signals in the spectrum are listed at right with Roman numerals. On your answer page write the Roman numeral of the chemical shift of each family on the line by that family's letta B. - A. sicer Fam., Chemical shift (ppm) 4.2 II 3.5 III 2.75 IV V 1.15...
What compound below has the most acidic protons? Question 5 Which compound below has the most acidic proton(s)? HCO CHE (H3C)2N^CH H CHE н, c cн, O ! III Ο Ν
Stuck on these two! Label all of the protons in the molecule below with letters to indicate which are equivalent. Describe each of the signals for the molecule shown below as a singlet, triplet, quartet or multiplet.