NAME: ORGANIC CHEM 2425 FINAL EXAM Fall 2017 DIRECTIONS- A periodic table is att
ID: 696998 • Letter: N
Question
NAME: ORGANIC CHEM 2425 FINAL EXAM Fall 2017 DIRECTIONS- A periodic table is attached at the end of this exam. Please answer all questions in the space provided as completely and clearly as pessible. Please show all your work for the wrizing portions of the cxam PART L Multiple Choise (2 points each): __1. Examining the IR spectrum of compound allows us to: A. Determine the types of fuectional groups present in the compound. B. Determine the C-H framewoek of the compound. C. Determine the molecular weight of the compound D. Desennine the nature of the conjugated pi electrons system in the compound E. None of these 2 How many sets of prosons would be observed in the 'H NMR spectrum for this coempound? CH1 OCH CH A. 3 B. 4 C. 5 D. 6 E. 7 Which of the following could be this unknown? (Ph phenyt group) C) CH3CH2CH2CH20H A) (CH3)3cCHO D) CH3COCH2Ph E) PhCHO 4. Consider the structure of 3-mety :2-Sutanone below, what is the splinting patiem foe the lydrogemns labeled c.? O H CH3 C) tripletD) quartet E) peutet A) singlet B) doubletExplanation / Answer
1) IR spectrum will allow to identify the type of functional group present in the molecule.
Answer option A)
2) there are 6 type of protons present in the molecule.
(note both CH3 and both aromatic H are equivalent H)
Answer option D) 6
3) in H-NMR peak at 11.5 ppm corresponds to H of carboxylic acid.
Answer option B) CH3CH2CH2COOH
4) for H labeled C has only one neighbor H so it will split into doublet.
Answer option B) doublet
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