5 - How could limonene be prepared from compounds containing four carbon atoms or less How can this diene be prepared from compounds containing

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Unformatted text preview: 2/1/2012 How could limonene be prepared from compounds containing four carbon atoms or less? How can this diene be prepared from compounds containing four carbon atoms or less? limonene limonene How could limonene be prepared from compounds containing four carbon atoms or less? Carbon-carbon bonds without electron withdrawing groups are generally unreactive as dienophiles. Why? limonene limonene 4 3 2 energy LUMO * What reaction produces a six membered ring containing a double bond? HOMO Diels-Alder reaction 1 What reactants would give the following compound using the Diels-Alder reaction? Carbon-carbon bonds without electron withdrawing groups are generally unreactive as dienophiles. Why? limonene limonene A. i + iii B. ii + iv C. i only 4 3 2 energy LUMO * HOMO Diels-Alder reaction 1 1 2/1/2012 What is the product of the following Diels-Alder reaction and how can it be converted to limonene? What elimination will give limonene? Can the required reactant be prepared from the ketone? limonene How can this compound be converted into limonene? What are important physical properties of conjugated systems? + light limonene Fluorescent dyes identifying three different cellular components of endothelial cells http://en.wikipedia.org/wiki/Fluorescence#Biochemist ry_and_medicine Will this work? Which -system, of the two dienes, is represented by the following molecular orbital diagram? A limonene B energy 2 2/1/2012 What do these four MOs look like? Which of the two molecular orbitals is lower in energy, A or B? energy Which of the two molecular orbitals is lower in energy, A or B? A B energy Which of the two molecular orbitals is lower in energy, A or B? energy energy Which compound, A or B, will absorb the longer wave length of light? A B energy energy 3 2/1/2012 Which compound, A or B, will absorb the longer wave length of light? A B All compounds of interest in biology are not hydrocarbons. Many contain oxygen and nitrogen. How do these elements modify our orbital models? 224 nm 178 nm Which compound, A or B, will absorb the longer wave length of light? B A Would the energy of the non bonding electrons on oxygen be above (A) or below (B) the highest occupied molecular orbital? 217 nm 224 nm 178 nm HOMO 224 nm, * energy Why are the MOs of the aldehyde lower in energy? Which compound, A or B, will absorb the longer wave length of light? A B 217 nm 224 nm 274 nm 4 ...
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This note was uploaded on 03/27/2012 for the course CHE 322 taught by Professor Staff during the Spring '08 term at SUNY Stony Brook.

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