Homework 3 (MOL S11)

Homework 3 (MOL S11) - V55.0310 NATURAL SCIENCE II:...

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1 V55.0310 NATURAL SCIENCE II: MOLECULES OF LIFE SPRING 2011 HOMEWORK 3 DUE AT THE BEGINNING OF CLASS ON WEDNESDAY, FEBRUARY 23 Name : _________________________________ __ Lab section and Time : _________________ Lab Instructor: _______________________________ Answer all questions on this sheet in the space provided. Two questions will be graded with a maximum of four points each. Two extra points will be awarded for completing all the questions. HYDROCARBONS Question 1: Butane is an alkane hydrocarbon with the formula C 4 H 10 . Consider the isomer n- butane where all the carbon atoms form a linear chain. Draw the following structures for n-butane: (a) The Lewis dot structure. (b) The two-dimensional structure. (c) The three-dimensional structure (viewed from the side)
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2 Question 2: Pentane is an alkane hydrocarbon with chemical formula C 5 H 12 . Use carbon-only structures to draw all of the different structural isomers of pentane. How many unique structural isomers exist for this molecule? [Hint: Look carefully at your drawings to make sure all of your isomers are distinct – i.e., they cannot be interconverted simply by rotating them in 3D space] Question 3 : Pentene is an alkene hydrocarbon with chemical formula C 5 H 10 . One isomer of pentene has the C=C double bond between carbon atoms numbered 2 and 3 (counting from the left). Draw carbon-only structures for the cis and trans isomers in pentene. Make sure that your structure drawings clearly distinguish between the two isomers.
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3 Question 4: The molecular starting material for the biological synthesis of
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This note was uploaded on 11/07/2011 for the course MAP V55.0310.0 taught by Professor Tracejordan during the Spring '11 term at NYU.

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Homework 3 (MOL S11) - V55.0310 NATURAL SCIENCE II:...

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