Organic Chemistry

OH NH 2 CC CC the double bond is given priority over a triple bond only when there is a tie >>>= increasing priority CO ...

Section 8.3 Relative Stabilities of Dienes 301 PROBLEM 1 Give the systematic name for each of the following compounds: a. e. b. ...

302 CHAPTER 8 Reactions of Dienes • Ultraviolet and Visible Spectroscopy 3-D Molecules: 2,3-Pentadiene; 1,4-Pentadiene; 1,3-Pent ...

PROBLEM 3 Name the following dienes and rank them in order of increasing stability. (Alkyl groups stabilize dienes in the same ...

304 CHAPTER 8 Reactions of Dienes • Ultraviolet and Visible Spectroscopy C a. b. C H C H H H CH 3 H H 3 C H C C C CH 3 H H 3 C H ...

If there is only enough electrophilic reagent to add to one of the double bonds, it will add preferentially to the more reactive ...

306 CHAPTER 8 Reactions of Dienes • Ultraviolet and Visible Spectroscopy Addition at the 1- and 2-positions is called 1,2-additi ...

Section 8.6 Electrophilic Addition Reactions of Conjugated Dienes 307 Let’s review by comparing addition to an isolated diene wi ...

308 CHAPTER 8 Reactions of Dienes • Ultraviolet and Visible Spectroscopy The thermodynamic product is the most stable product. T ...

Section 8.7 Thermodynamic Versus Kinetic Control of Reactions 309 If, on the other hand, the reaction is carried out under suffi ...

310 CHAPTER 8 Reactions of Dienes • Ultraviolet and Visible Spectroscopy interconvert, the relative amounts of the two products ...

Section 8.7 Thermodynamic Versus Kinetic Control of Reactions 311 chemists thought it was because the transition state for forma ...

PROBLEM 10 a. When HBr adds to a conjugated diene, what is the rate-determining step? b. When HBr adds to a conjugated diene, w ...

Section 8.8 The Diels–Alder Reaction: A 1,4-Addition Reaction 313 8.8 The Diels–Alder Reaction: A 1,4-Addition Reaction Reaction ...

314 CHAPTER 8 Reactions of Dienes • Ultraviolet and Visible Spectroscopy C C H H H C C H H H H O C C C H H H C H N Figure 8.3N B ...

Section 8.8 The Diels–Alder Reaction: A 1,4-Addition Reaction 315 To construct the HOMO and LUMO needed to illustrate the transf ...

316 CHAPTER 8 Reactions of Dienes • Ultraviolet and Visible Spectroscopy if the substituents in the dienophileare cis, they will ...

Section 8.8 The Diels–Alder Reaction: A 1,4-Addition Reaction 317 If the dienophile has two carbon–carbon double bonds, two succ ...

Which of the two products will be formed (or will be formed in greater yield) de- pends on the charge distribution in each of th ...

Section 8.8 The Diels–Alder Reaction: A 1,4-Addition Reaction 319 3-D Molecules: s-trans Conformation of Butadiene; s-cis Confor ...