CHE201B - Final Exam 2005

CHE201B - Final Exam 2005 - Organic Chemistry 201/203 Final...

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Organic Chemistry 201/203 Final Examination December 14, 2005 Name (Print in Capitals) __________________ Signature ____________________________ Student Identification _________________________________ Number Question Total Score (I) 100 ________ (II) 20 ________ (III) 60 ________ (IV) 60 ________ (V) 60 ________ Total 300 ________
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2 Cl (a) (b) (c) (d) (e) (I) Enter the letter for the best answer to each of the following questions (4 points each). ____ E ___ (1) Which of the following statements about the physical properties of organic molecules is false? (a) The substitution of a halogen atom for a hydrogen at an alkane increases the boiling point for the molecule. (b) The boiling point of a linear alkane increases with increasing chain length. (c) The substitution of an HO group for a hydrogen at an alkane increases the boiling point for the molecule. (d) The melting point for alkanes of constant molecular weight increases with increasing branching. (e) The boiling point for alkanes of constant molecular weight increases with increasing branching. ___ C ____ (2) What is the correct IUPAC name of the following molecule: (a) 2,5-dimethyl-4-(1-methylpropyl)hexane (b) 2,6-dimethyl-4-(1-methylethyl)heptane (c) 2,5-dimethyl-4-(1-methylethyl)heptane (d) 2,4-dimethyl-4-(1-methylpropyl)hexane (e) None of these names is correct __ D _____ (3) The following name violates one or more rules of the IUPAC system of nomenclature: 4-(2-ethylbutyl)octane Chose the correct IUPAC name for this compound from the following list. (Hint: It will be helpful to write out the structure of this compound). (a) 3-propyl-5-ethyldecane (b) 2,5-dipropylnonane (c) 5-(2-ethylbutyl)nonane (d) 3-ethyl-5-propylnonane (e) None of these names is correct ___ C ____ (4) How many secondary hydrogens are there in the following molecule? (a) 2 (b) 4 (c) 6 (d) 8 (e) 10 ____ A ___ (5) Which of the following molecules has the most strain energy? Cl Score - Problem I
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3 __ D _____ (6) How many equatorial hydrogens are there in the most stable chair form of cis -1,4 dimethylcyclohexane? (a)
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This note was uploaded on 10/10/2010 for the course CHE 201 taught by Professor Bong during the Fall '08 term at SUNY Buffalo.

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CHE201B - Final Exam 2005 - Organic Chemistry 201/203 Final...

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