Practice Quiz 2 - Spring 2004 - Organic Chemistry II | CHEM 30B, Quizzes of Organic Chemistry

Download Practice Quiz 2 - Spring 2004 - Organic Chemistry II | CHEM 30B and more Quizzes Organic Chemistry in PDF only on Docsity! Q 1 2 3 4 5 6 7 8 9 10 Last Name Student ID Number: Discussion Section – Day: Time: Circle the name of your TA: MIKE ROB Chem 30B Spring 2004 QUIZ #2 (15 Min) Weds May 12th INTERPRETATION OF THE QUESTIONS IS PART OF THE EXAM – DO NOT ASK FOR THE QUESTIONS TO BE EXPLAINED TO YOU USE CAPITAL LETTERS WHEN FILLING IN THE BOXES AND BE CLEAR – IF WE CAN'T FIGURE OUT WHAT A LETTER IS, IT WILL AUTOMATICALLY BE GRADED AS INCORRECT ***DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO*** ANSWER TO BONUS QUESTION First Name MI Total Score / 30 Total Teachers open the door. You enter by yourself. – Chinese Proverb Questions 1–10 are worth 3 points each. The bonus is worth 5 points. 1. Which compound shown below does NOT have five signals in its (1H-decoupled) 13C-NMR spectrum? A B C D E 2. Protons HA and HB in propylene oxide (shown below) are best described as – O HCHA HB A Diastereotopic B Homotopic C Constitutionally Heterotopic D The Same E Enantiotopic 3. The (1H-decoupled) 13C-NMR spectrum of methyl methacrylate is shown below. The δ values are shown above each peak with the corresponding assignment from the DEPT spectrum. From left to right (low field to high field), what is the correct assignment of the signals using the labels (a thru e) as shown on the structure? 200 150 100 50 0 δ 167 (C) 136 (C) 125 (CH2) 52 (CH3) 18 (CH3) O O a b c d e A d, c, b, a, e B d, b, c, a, e C d, b, c, e, a D d, c, b, e, a E d, e, b, c, a