Zadanie 29
Which compound is most susceptible to attack by an electrophile? A. Butane, CH3CH2CH2CH3 B. 1-Chlorobutane, CH3CH2CH2CH2Cl C. But-2-ene, CH3CH=CHCH3 D. Cyclohexane, C6H12
Electrophilic addition reactions of alkenes
Explain why the electron-rich C=C bond makes alkenes react with electrophiles, and write equations for the addition of water (with an acid catalyst), halogens and hydrogen halides to alkenes, including the bromine water test for unsaturation.
Tę umiejętność sprawdza 16 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 16 Otwórz w wyszukiwarce z filtrami
Zadanie 30
What is the product of the reaction between hex-3-ene and steam, H2O(g)? A. Hexan-3-ol B. Hexan-1-ol C. Hexanal D. Hexan-3-one
Zadanie 4a
The structure of galantamine is shown below. (i) State the type of structural formula shown. (ii) State the name of the functional group that contains the nitrogen atom. (iii) Outline the effect of this functional group on the pH of water in which galantamine…
- Materiał graficzny
Zadanie 6c
But-2-ene and other alkenes serve as starting materials for a wide range of compounds. (i) Predict the product formed when but-2-ene reacts with bromine. (ii) Outline why but-2-ene, unlike butane, readily undergoes this type of reaction. (iii) State the…
- Tabela do uzupełnienia
Zadanie 30
Pent-2-ene undergoes a range of addition reactions. Which reagent and product are correctly matched? A. Reagent H2, product pent-1-ene B. Reagent Br2, product 2,3-dibromopentane C. Reagent H2O, product pentan-1-ol D. Reagent HBr,…
Zadanie 4e
Propene can be converted into propan-2-ol in a single reaction. State the equation for this conversion.
Zadanie 4g
Butanone can be made by the oxidation of butan-2-ol. Butan-2-ol can be synthesised in two ways: from an alkene H by the addition of water, or from a halogenoalkane J by a substitution reaction with aqueous sodium hydroxide. Draw the structure of H and state…
Zadanie 25
What is the major product formed when bromine, Br2, reacts with but-1-ene in an inert solvent? A. 2,2-dibromobutane B. 2-bromobutane C. 1,2-dibromobutane D. 1-bromobutane
Zadanie 24
Which products are formed when hex-3-ene reacts separately with hydrogen bromide, HBr, to give X, and with bromine, Br2, to give Y? A. X: 2-bromohexane; Y: 3,4-dibromohexane B. X: 3,4-dibromohexane; Y: 3-bromohexane C. X: 3-bromohexane; Y:…
- Materiał graficzny
Zadanie 6e
Hex-3-ene, CH3CH2CH=CHCH2CH3, reacts with chlorine, Cl2. (i) Identify the type of reaction that takes place. (ii) Predict the structural formula of the organic product of this reaction. (iii) Hex-3-ene can also undergo addition polymerization.…
Zadanie 27
Bromine water, which is orange, is added to four organic compounds in the dark. In which case does the orange colour disappear? A. Pentane B. Pentan-2-ol C. Pent-2-ene D. Pentanoic acid
Zadanie 3d
Compound B, shown below, can also be made by the hydration of an alkene. The same reaction also gives a smaller amount of the isomer 3-methylbutan-2-ol, (CH3)2CHCH(OH)CH3. (i) Draw the structural formula of the alkene that is needed. (ii) Deduce the…
- Materiał graficzny
Zadanie 4c
Two colourless liquids in unlabelled bottles are cyclohexane and cyclohexene. Describe a chemical test, and the expected observation with each liquid, that would show which bottle contains cyclohexene.
Zadanie 4d
(i) Draw the full structural (displayed) formula of hex-3-ene. (ii) Write an equation for the addition of hydrogen bromide to hex-3-ene. (iii) State the type of reaction in (ii).
Zadanie 27
Which pair of reaction mechanisms is typical of the reaction of an alkene with bromine and of the reaction of bromoethane with aqueous sodium hydroxide, respectively? A. Electrophilic addition and electrophilic addition B. Electrophilic addition and…
Zadanie 4b
Bromine water is added to compound A. Describe the change observed.
- Materiał graficzny