Concept explainers
(a)
To determine: If the given compound is terpene.
Interpretation: If the given compound is terpene is to be stated.
Concept introduction: An isoprene unit is bunched of five-carbon atoms. In terpenes, the isoprene units are connected to each other in head to tail fashion. The head part of an isoprene unit is branched, whereas the tail part of an isoprene unit is un-branched.
(b)
To determine: If the given
Interpretation: If the given compound is terpene is to be stated.
Concept introduction: A compound is said to be aromatic when it follows
(c)
To determine: The products that results from the saponification of given compounds with
Interpretation: The products that results from the saponification of given compounds with
Concept introduction: The formation of ester molecule from
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Organic Chemistry Plus Masteringchemistry With Pearson Etext, Global Edition
- a. A student did not obtain any ester when he added 2,4,6-trimethylbenzoic acid to an acidic solution of ethanol. Why? (Hint: Build models.)b. Would he have encountered the same problem if he had tried to synthesize the methyl ester of 4-methylbenzoic acid in the same way?arrow_forward1. Construct a chain of 7 carbon atoms that contains an alcohol and an alkyl as a functional group. Name by IUPAC Nomenclature 2. Construct a 9-point cycle that has a carboxylic acid and an ene as functional group. Name by IUPAC Nomenclature 3. construct a carbon chain containing one esters. Name by IUPAC Nomenclature 4. build a chain of 12 carbon atoms that contains as functional group an aldehyde, an aromatic and a cycle. Name by IUPAC Nomenclaturearrow_forward* Question Completion Status: A Moving to the next question prevents changes to this answer. Question 2 Coupling a terminal alkyne with an alkenyl halide, using a mixture of a Pd and Cu(l) catalyst, is an example of O A. Sonogashira Coupling O B. Suzuki-Miyaura Coupling OC. Heck-Mizoroki Coupling OD. Gilman Reagent-Mediated Coupling O E. Stille Coupling and Carbonylation reaction A Moving to the next question prevents changes to this answer.arrow_forward
- Circle the correct bolded word. a. Hydrogenation of an alkyne with palladium on carbon can / cannot be controlled to give an alkene. b. When a reaction becomes more exothermic, the transition state looks more like the substrate / product. C. Addition of two equivalents of HBr to an alkyne results in a vicinal / geminal dibromide. d. An SN2 reaction involves the collision of two alkyl halides to form a new carbon-carbon bond. True / Falsearrow_forward2. Which of the following alkynes will form only 1 product in acid-catalyzed hydration? a. 2-pentyne b. 3-hexyne c. 3-pentyne d. 1-hexyne 3. Which of the following statements best describes the general reactivity of alkynes? a. An alkyne reacts as an electrophile and is, therefore, electron poor. b. Alkynes undergo electrophilic addition reactions just like alkenes. c. An alkyne reacts as an electrophile and is therefore electron-rich. d. An alkyne reacts as a nucleophile and is therefore electron-poor.arrow_forwardWhich is TRUE? A. The carbonyl compound got oxidized by the Grignard reagent. B. The product as it is shown is incorrect since the alkene moieties are also expected to react. C. The methyl magnesium bromide acts as the electrophile. D. The product is not expected to undergo tautomerization since it is not an enol E. The secondary alcohol product results from the reduction of the carbonyl starting material.arrow_forward
- Triethylenemelamine (TEM) is an antitumor agent. Its activity is due to its ability to cross-link DNA. a. Explain why it can be used only under slightly acidic conditions. b. Explain why it can cross-link DNA.arrow_forwardPlease fill out for each reaction i.Fill in the missing starting materials, products, or reagents as necessary.If no reaction occurs, write "N.R." and explain why this is the case. ii. Label each transformation as SN1, SN2, or acid/base. iii. Indicate if the product is racemic or a single enantiomer.arrow_forwardWhich of the following is true? a. Alkene reaction always results into a mixture of products because both carbons in the double bond have equal chances of being used for binding. b. Only the more stable carbon is used for binding the nucleophile in alkene/alkyne reactions.(HA) c. A mixture of addition product is always formed with internal alkenes. d. None of the abovearrow_forward
- 1. The molecule below is ascorbic acid, also known as vitamin C. a. As drawn below, ascorbic acid is shown as a diketone. An enol tautomer of ascorbic acid exists and is how the molecule is usually drawn. Draw the enol tautomer of ascorbic acid. b. Show the mechanism for tautomerization under basic conditions from the ketone to the enol. c. Ascorbic acid has a pK₂ of 4.6 which is more similar to that of a carboxylic acid than an alcohol. Which H is most acidic in ascorbic acid? d. Explain why Vitamin C is so acidic. OH OH ascorbic acid OHarrow_forwarda. What reagent(s) are needed to synthesize the enamine below. Also, draw the resonance structure(s) for the enamine. b. Predict the product of the reaction between the enamine from part a and ethyl iodide. Also explain why it forms, including any selectivities. Hint: Consider the type of reaction alkyl halides take part in and the resonance structure(s) in part a. Etlarrow_forwardConsider the following reaction. Å Ph₂P Draw the alkene product of this Wittig reaction. ? Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Consider E/Z stereochemistry of alkenes. Include H atoms at chiral centers only. If a group is achiral, do not use wedged or hashed bonds on it. • Do not include lone pairs in your answer. They will not be considered in the grading. Ⓡ On [1arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning