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Concept explainers
(a)
Interpretation:
The structure of the
Concept introduction:
The reaction of an
(b)
Interpretation:
The structure of the alkene formed by the reaction of methyl bromide with
Concept introduction:
The reaction of an aldehyde or a ketone with ethylidene triphenylphosphorane that is phosphorous Ylides results in the formation of alkene as the final product. This reaction is commonly known as Wittig reaction.
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Chapter 19 Solutions
EBK ORGANIC CHEMISTRY
- Which of the following is true for the reactions of alkyl halides? (a) The characteristic reactions of alkyl halides are oxidation and reduction.(b) The characteristic reactions of alkyl halides are elimination and substitutionc. The characteristic reactions of alkyl halides are addition and substitutiond. Characteristic reactions of alkyl halides are addition and elimination.arrow_forwardExplain the structural formula for (C) (B) (A) in the following reaction:arrow_forward6. Describe concisely a chemical test to distinguish between the following pairs of compounds. (a) n-pentanol and 3-methylpentan-3-ol (b) Ethanal dan pentanal (c) Phenol and benzoic acidarrow_forward
- (a) One test for the presence of an alkene is to add a smallamount of bromine, which is a red-brown liquid, and lookfor the disappearance of the red-brown color. This test doesnot work for detecting the presence of an aromatic hydrocarbon.Explain. (b) Write a series of reactions leading topara-bromoethylbenzene, beginning with benzene andusing other reagents as needed. What isomeric side productsmight also be formed?arrow_forwardProvide the reagents and solvents (where appropriate) needed to bring about the following transformations. (a) CI (b)arrow_forwardH H Write the structures of the alkenes that would yield the following carbonyl compounds PRACTICE PROBLEM 8.22 when treated with ozone and then with dimethyl sulfide. (a) and (c) EO and `H oalio (2 mol is produced from 1 mol of alkene) (b) H.arrow_forward
- (a) Give chemical tests to distinguish between compounds in the following pairs of substances :(i) Ethanol and Propanal (ii) Benzoic acid and Ethyl benzoate(b) An organic compound contains 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of the compound is 86. It does not reduce Tollen’s reagent but forms an addition compound with sodium hydrogen sulphite and gives positive iodoform test. On vigorous oxidation it gives ethanoic and propanoic acids. Derive the structure of the compound.arrow_forwardWrite the structure of the major organic product formed in the reaction of 1-pentene with each of the following: (a) Hydrogen chloride (b) Dilute sulfuric acid (c) Diborane in diglyme, followed by basic hydrogen peroxide (d) Bromine in carbon tetrachloride (e) Bromine in water (f) Peroxyacetic acid (g) Ozone (h) Product of part (g) treated with zinc and water (i) Product of part (g) treated with dimethyl sulfide (CH3)2Sarrow_forward(a) When bromine is added to two beakers, one containing phenyl iso propyl ether and the other containing cyclohexene, the bromine color in both beakers disappears. What observation could you make while performing this test that would allow you to distinguish the alkene from the aryl ether? (b) Write any three methods in detail for the preparation of aldehyde from primary alcohol. (c) State the clemmenson reduction.arrow_forward
- Propose structure and give correct IUPAC names for the following: (a) A cyclic alkane with three methyl groups (b) A diethyldimethylhexanearrow_forwardDraw the structures of the following compounds. (a) sec-butyl chloridearrow_forwardAcid-catalyzed dehydration of 2,2-dimethyl-1-hexanol gave a number of isomeric alkenes including 2-methyl-2-heptene as shown in the following equation.(a) Write a stepwise mechanism for the formation of 2-methyl-2-heptene, using curved arrows to show the flow of electrons. (b) What other alkenes do you think are formed in this reaction?arrow_forward
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