Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 16.SE, Problem 25VC
The following molecular model of a dimethyl-substituted biphenyl represents the lowest-energy conformation of the molecule. Why are the two benzene rings tilted at a 63� angle to each other rather than being in the same plane so that their p orbitals overlap? Why doesn't complete rotation around the single bond joining the two rings occur?
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Chapter 16 Solutions
Organic Chemistry
Ch. 16.1 - Prob. 1PCh. 16.2 - Propose a mechanism for the electrophilic...Ch. 16.2 - How many products might be formed on chlorination...Ch. 16.2 - When benzene is treated with D2SŪ4. deuterium...Ch. 16.3 - Prob. 5PCh. 16.3 - What is the major monosubstitution product from...Ch. 16.3 - Identify the carboxylic acid chloride that might...Ch. 16.4 - Rank the compounds in each of the following groups...Ch. 16.4 - Predict the major products of the following...Ch. 16.4 - Prob. 10P
Ch. 16.4 - Prob. 11PCh. 16.4 - Acetanilide is less reactive than aniline toward...Ch. 16.4 - Prob. 13PCh. 16.5 - At what position would you expect electrophilic...Ch. 16.5 - Show the major product(s) from reaction of the...Ch. 16.6 - The herbicide oxyfluorfen can be prepared by...Ch. 16.7 - Treatment of p-bromotoluene with NaOH at 300°C...Ch. 16.8 - Prob. 18PCh. 16.8 - Prob. 19PCh. 16.8 - Prob. 20PCh. 16.9 - Prob. 21PCh. 16.10 - Prob. 22PCh. 16.10 - Prob. 23PCh. 16.SE - Prob. 24VCCh. 16.SE - The following molecular model of a...Ch. 16.SE - Prob. 26VCCh. 16.SE - Prob. 27VCCh. 16.SE - Aromatic iodination can be carried out with a...Ch. 16.SE - Prob. 29MPCh. 16.SE - The carbocation electrophile in a Friede1-Crafts...Ch. 16.SE - Prob. 31MPCh. 16.SE - The nitroso group, —N=O, is one of the few...Ch. 16.SE - Triphenylmethane can be prepared by reaction of...Ch. 16.SE - Using resonance structures of the intermediates,...Ch. 16.SE - Benzene and alkyl -substituted benzenes can be...Ch. 16.SE - Prob. 36MPCh. 16.SE - Hexachlorophene, a substance used in the...Ch. 16.SE - Benzenediazonium carboxylate decomposes when...Ch. 16.SE - 4-Chloropyridine undergoes reaction with...Ch. 16.SE - Propose a mechanism to account for the following...Ch. 16.SE - In the Gatterman-Kochreaction, a formyl group...Ch. 16.SE - Treatment of p-tert-butylphenol with a strong acid...Ch. 16.SE - Benzyl bromide is converted into benzaldehyde by...Ch. 16.SE - Prob. 44MPCh. 16.SE - Prob. 45MPCh. 16.SE - Prob. 46APCh. 16.SE - Prob. 47APCh. 16.SE - Prob. 48APCh. 16.SE - Predict the major monoalkylation products you...Ch. 16.SE - Name and draw the major product(s) of...Ch. 16.SE - Prob. 51APCh. 16.SE - Prob. 52APCh. 16.SE - What product(s) would you expect to obtain from...Ch. 16.SE - Prob. 54APCh. 16.SE - How would you synthesize the following substances...Ch. 16.SE - Prob. 56APCh. 16.SE - Prob. 57APCh. 16.SE - Prob. 58APCh. 16.SE - Prob. 59APCh. 16.SE - Prob. 60APCh. 16.SE - Prob. 61APCh. 16.SE - Prob. 62APCh. 16.SE - Prob. 63APCh. 16.SE - How would you synthesize the following substances...Ch. 16.SE - Prob. 65APCh. 16.SE - Prob. 66APCh. 16.SE - Draw resonance structures of the intermediate...Ch. 16.SE - Prob. 68APCh. 16.SE - p-Bromotoluene reacts with potassium amide to give...Ch. 16.SE - Prob. 70APCh. 16.SE - Prob. 71APCh. 16.SE - Prob. 72APCh. 16.SE - Use your knowledge of directing effects, along...Ch. 16.SE - Identify the reagents represented by the letters...Ch. 16.SE - Phenols (ArOH) are relatively acidic, and the...Ch. 16.SE - Prob. 76APCh. 16.SE - Prob. 77APCh. 16.SE - Melamine, used as a fire retardant and a component...
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- Hw.139.arrow_forward2,4-dimethy/-2,3-pentadiene has the following line diagram structure (with hydrogens drawn in). Explain with PICTURES of the sigma and pi bonds and with words why this molecule does not actually have a planar arrangement of methyl groups. Include an electron diagram of the hybridization of the central carbon atom.arrow_forwardWrite a conformational structure for 1,2,3-trimethylcyclohexane in which all the methyl groups are axial and then show its more stable conformation.arrow_forward
- How many π molecular orbitals (π-MOs) are formed from the linear combination of atomicorbitals (AOs) contributing to the π-bonding in pentene?arrow_forwardIt is easy to imagine a cyclohexane as a flat hexagon and a lot of the time we draw it that way. Looking at 1,3,5-triethylcyclohexane we cannot tell the stability of the molecule from looking at the flat 2D drawing. Explain why we need to look at the 3D configuration and what conformation (axial,equatorial) would each of the three ethyl groups be in for the most stable configuration.arrow_forwardThe energy difference between a tert-butyl group going from equatorial to axial in a cyclohexane is 18.3 kJ/mol. When two of the carbon atoms are replaced with oxygen atoms (molecule B) the energy difference between the two chair conformations drops to 5.9 kJ/mol. Explain this difference. (Hint: Consider what makes putting groups axial unfavorable).arrow_forward
- 4. For each of the following molecular formulae, how many elements of unsaturation are present? C10H22O2 C₂HCISO₂ C7H7Br₂NO2 C16H10 (Draw a reasonable organic molecule with this formula) CastHasFINP115e30sa ⚫ CH2 (What might the structure of this species be? How can it have a nonzero number of elements of unsaturation without any rings or pi bonds?) • C₂H9B (Oh dear! I never told you what to do with boron...)arrow_forwardSection 7.3 shows that the compound 2-butene exists intwo isomeric forms, which can be interconverted only bybreaking a bond (in that case, the central double bond).How many possible isomers correspond to each of the following chemical formulas? Remember that a simple rotation of an entire molecule does not give a different isomer.Each molecule contains a central CuC bond.(a) C2H2Br2(b) C2H2BrCl(c) C2HBrClFarrow_forwardPyrethrins, such as jasmolin II(below), are a group of naturalcompounds synthesized by flowers of the genus Chrysanthemum(known as pyrethrum flowers) to act as insecticides.(a) Circle and name the functional groups in jasmolin II.(b) What is the hybridization of the numbered carbons?(c) Which, if any, of the numbered carbons are chiral centers?arrow_forward
- Examine the sigma bonding in ethene. What types of orbitals does each C atom use when forming sigma bonds to the H atoms? s orbial p orbitals Ohybrid orbitals Submit What type of orbital does each C atom use to form a sigma bond to the other C atom? s orbial p orbitals hybrid orbitals O Submit Now examine the pi bonding in ethene. What types of orbitals on the C atoms are used to form the pi bond? Os orbital p orbitals hybrid orbitals Submitarrow_forwardsketch the various conformational isomers of 1,3-dimethylcyclohexane. Indicate the position (axial/equatorial) of each of the methyl groups in each structure.arrow_forwardIs there a difference in the stability of the two cyclohexane conformations?arrow_forward
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