Which of the following conjugated dienes represent two conformations? Onlu I and II Only I and...
| | | 14. Which of the following compounds is conjugated? Yoo 2attach A. I and III B. II and III S II and IV II, III and IV oops forg 15. Which of the following conjugated dienes represent two conformations? A Only I and II Only I and III C. Only II and III D. None of the choices my
Which of the following compounds have conjugated double bonds? I II III IV II and v II, IV, and v I and III I, III, and IV all of them
22. Which of the following compounds is(are) conjugated diene(s)? II III IV a. ll only b. I and III c. I and IV d. II, Ill, and IV 23. Vitamin D, has the following structure. Classify the circled pi-bond in vitamin D, as conjugated, cumulated or isolated a. Conjugated b. Cumulated c. Isolate 24. What is the IUPAC name for the following compound? a. (22,42,6E)-3,4,7-trimethylocta-2,4,6-triene b. (2,4,6E)-2,5,6-trimethylocta-2,4,6-triene c. (25,4Z)-3,4,7-trimethylocta-2,4,6-triene d. (48,6E)-2,5,6-trimethylocta-2,4,6-triene
Which of the following conjugated dienes would NOT react with a dienophile in a Diels-Alder reaction? B A D с A a
Which of the following represent systematic risks? I. the president of a company suddenly resigns II. the economy goes into a recessionary period III. a company's product is recalled for defects IV. the Federal Reserve unexpectedly changes interest rates A. II and IV only B. I, II and III only C. I and III only D. I, II and IV only
A. Double bonds that are connected by a single bond are said to be conjugated. For each molecule below, indicate how many conjugated double bonds are present in each molecule. HO OH bro HO B. One feature that distinguishes conjugated dienes from isolated dienes is that the C-C bond joining the two double bonds is unusually short. For each of the molecules in Part A, indicate which C-C single bond(s) might be shorter than expected. C. Some reactions of conjugated...
Which of the following represent, respectively, conjugate intensive and extensive, properties? I . pressure, volume II. temperature, heat III. chemical potential, Gibbs free energy A. I only B. III only C. I and II D. II and III E. I , II and III
20. Not all of the following pairs of dienes and dienophiles (in their depicted conformations) will undergo a Diels-Alder [4+2] cycloaddition reaction. Write NR (no reaction) following the reaction arrow for those reactions that are not expected to occur. 20. Not all of the following pairs of dienes and dienophiles in their depicted conformations) will undergo a Diels-Alder [4+2] cycloaddition reaction. Write NR (no reaction) following the reaction arrow for those reactions that are not expected to occur. + +...
Rank the reactivity order of the following dienes with maleic anhydride, starting with the fastest. II IV 01>IV> III > II II > III >I>IV O III>I>IV> II III > IV>I> II
Passage 11 (Questions 1-9) Dienes, a special group of alkenes, can be classified as conjugated or isolated. Conjugated dienes are alkenes with alternating double and single bonds. Isolated dienes have double bonds separated by more than one single bond. One explanation for this observation is the hybridization theory. According to the hybridization theory, the stability of conjugated dienes comes from the hybridization of the orbitals forming the carbon-carbon single bonds. For example, in 1,4-pentadiene, the C-C single bonds result from...