Chemistry 310N Dr. Brent Iverson 1st Midterm Feb. 19, 2009 NAME (Print): _____________________________ SIGNATURE: _____________________________ Please Note: This test may be a bit long, but there is a reason. I would like to give you a lot of little questions, so you can find ones you can answer and show me what you know, rather than just a few questions that may be testing the one thing you forgot. I recommend you look the exam over and answer the questions you are sure of first , then go back and try to figure out the rest. Also make sure to look at the point totals on the questions as a guide to help budget your time. Note: You must have your answers written in pen if you want a regrade!!!! Please print the first three letters of your last name in the three boxes For synthesis problems GO FOR PARTIAL CREDIT EVEN IF YOU DO NOT KNOW THE ENTIRE ANSWER!!!WRITE DOWN WHAT YOU DO KNOW IS IN THE REACTION SEQUENCE SOMEWHERE. YOU WILL GET PARTIAL CREDIT IF IT IS CORRECT
15 14 13 12 11 10 9 8 7 (5) (5) (5) (-) (5) (12) (14) (35) (23) (18) (10) (13) (13) (19) (248) 16 6 Total T Score HW 17 18 19 Total Grade (HW score + Exam Grade) % 5 (6) (5) 4 (26) 3 2 (23) 1 Page Points (11)
Honor Code The core values of the University of Texas at Austin are learning, discovery, freedom, leadership, individual opportunity, and responsibility. Each member of the University is expected to uphold these values through integrity, honesty, trust, fairness, and respect toward peers and community. (Your signature)
Pg 1 _____________(23) A. B. 3. (3 pts each) Write an acceptable IUPAC name for the following molecules: Signature_________________________ 1. (3 pts) For this class, the most important question in organic chemistry is: 2. (14 points) Suppose a relative of yours is having an MRI. In no more than four sentences, explain to them what is happening when they have the MRI scan. We wil be looking for a minumum of 7 key points here. C H 3 C CH 3 CH 3 CH 2 C O H O Cl
Pg 2 _____________(11) A. B. 4. (3 pts each) Write a structure that corresponds to the following IUPAC names: Signature_________________________ (2 S, 3 S) -3-Hydroxy-2-ethylhexanal 3-Methyl-3-butene-2-one In the NMR experiments most useful to organic chemists, the nuclei _______ and ______ are the most important since these are commonly found in organic molecules and they have spin quantum numbers of 1/2. Nuclei with spin quantum number 1/2 are quantized in one of two orientations, "______" (lower energy) or "______"(higher energy) in the presence of an external magnetic field, that is, with and against the external field, respectively. The difference in energy between nuclear spin states is __________________________to the strength of the magnetic field experienced by the nucleus. 5. (1 pt each) Fill in each blank with the word that best completes the following sentences about NMR.
Pg 3 _____________(26) 6. (2 pts each) Circle all of the following statements about NMR that are true (do nothing if the statements are false). Signature_________________________ If electromagnetic energy of the precise energy difference between the +1/2 and -1/2 spins states is used to irradiate the sample, the energy is absorbed as the spin "flips" from the +1/2 state to the - 1/2 state.
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