
(a)
Interpretation: The diene and dienophile from the given compounds has to be predicted.
Concept Introduction:
Diels-Alder reaction:
A conjugated diene reacts with a compound containing a carbon-carbon double bond. It is a cycloaddition reaction, where two reactants form a cyclic product.
Conformation of Diene:
S-Cis Conformer: The double bonds are cis about the single bond (s stands for single), in an s-cis conformer.
S-trans Conformer: The double bonds are trans- about the single bond (s stands for single) in an s-trans conformer.
Condition for Diels-Alder reaction:
The conjugate diene must be in an s-cis conformation because when it is in an S-trans conformation, C-1 and C-4 are too far apart to react with the dienophile in a concerted reaction.
(b)
Interpretation: The diene and dienophile from the given compounds has to be predicted.
Concept Introduction:
Diels-Alder reaction:
A conjugated diene reacts with a compound containing a carbon-carbon double bond. It is a cycloaddition reaction, where two reactants form a cyclic product.
Conformation of Diene:
S-Cis Conformer: The double bonds are cis about the single bond (s stands for single), in an s-cis conformer.
S-trans Conformer: The double bonds are trans- about the single bond (s stands for single) in an s-trans conformer.
Condition for Diels-Alder reaction:
The conjugate diene must be in an s-cis conformation because when it is in an S-trans conformation, C-1 and C-4 are too far apart to react with the dienophile in a concerted reaction.
(c)
Interpretation: The diene and dienophile from the given compounds have to be predicted.
Concept Introduction:
Diels-Alder reaction:
A conjugated diene reacts with a compound containing a carbon-carbon double bond. It is a cycloaddition reaction, where two reactants form a cyclic product.
Conformation of Diene:
S-Cis Conformer: The double bonds are cis about the single bond (s stands for single), in an s-cis conformer.
S-trans Conformer: The double bonds are trans- about the single bond (s stands for single) in an s-trans conformer.
Condition for Diels-Alder reaction:
The conjugate diene must be in an s-cis conformation because when it is in an S-trans conformation, C-1 and C-4 are too far apart to react with the dienophile in a concerted reaction.

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Chapter 8 Solutions
Organic Chemistry
- Draw an a amino acid with an ethyl (-CH2-CH3) side chain. Draw the molecule as it would appear at physiological pH. Click and drag to start drawing a structure. :□ S टेarrow_forwardWrite the systematic name of each organic molecule: HO Cl structure O OH O HO OH name ☐ OH OH ☐ OH ☐arrow_forwardWrite the name of a naturally-occuring hydrophillic amino acid. (You will find the structures of the naturally-occuring amino acids in the ALEKS Data resource.) × $arrow_forward
- Please note that it is correct and explains it rightly:The proportion of O, C and H in the graphite oxide is:a) Constant, for the quantities of functional groups of acids, phenols, epoxy, etc. its constantsb) Depending on the preparation method, as much oxidant as the graphite is destroyed and it has less oxygenc) Depends on the structure of the graphic being processed, whether it can be more three-dimensional or with larger crystals, or with smaller crystals and more borders.arrow_forwardThe proportion of O, C and H in the graphite oxide is constant, only the cantidades of functional groups of acids, phenols, epoxy, etc. its constants. ¿Is it correct?arrow_forwardThe proportion of O, C and H in the graphite oxide depends on the structure of the graph that is processed, which may be more tridimensional or with larger crystals, or with smaller crystals and more borders. ¿Is it correct?arrow_forward
- In mixed oxides with superconducting properties, we find Cu:a) Frequentlyb) Alwaysc) Almost neverarrow_forwardThe proportion of O, C and H in the graphite oxide depends on the preparation method, as long as the most oxidant, the most graphite is destroyed and has less O. Is it correct?arrow_forwardWrite the complete common (not IUPAC) name of each molecule below. Note: if a molecule is one of a pair of enantiomers, be sure you start its name with D- or L- so we know which enantiomer it is. molecule C=O H3N CH3 common name (not the IUPAC name) H ☐ C=O H O-C-CH2-CH2 010 NH3 ☐ H3N ☐ HO 5arrow_forward
- Write the systematic name of each organic molecule: structure CI CH3 HO-C-CH-CH-CH2 – CH— CH3 CH3 name X O ☐ CH3-CH-CH2-CH2-C-OH CH3 11 HO-C-CH-CH2-OH CH3 ☐arrow_forwardCheck the box under each a amino acid. If there are no a amino acids at all, check the "none of them" box under the table. Note for advanced students: don't assume every amino acid shown must be found in nature. CH3 CH2 0 C=O + CH-CH3 H₂N C-COOH H₂N H H H3N C COO¯ NH, O HO C C H CH3-CH HO C=O H2N-CH-COOH CH2 NH3 HO CH3 none of them O NH3arrow_forwardhandwritten answer please!arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning

