Write the propagation and termination steps for the reaction of an alkane with a halogen, explain why a mixture of products forms, and account for the low reactivity of alkanes through their strong, non-polar C-C and C-H bonds.
Tę umiejętność sprawdza 7 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Pentane reacts with bromine, Br2, to form 2-bromopentane. (i) Explain, using equations, the initiation step and two propagation steps for this reaction. (ii) 2-Bromopentane reacts with aqueous sodium hydroxide, NaOH(aq), to form pentan-2-ol,…
Methane reacts with bromine gas in the presence of UV radiation to produce brominated hydrocarbons. (i) Explain, using an equation, how a bromine molecule undergoes homolytic fission. (ii) Using two equations, explain the propagation steps in the substitution…
Ethane, C2H6, reacts with chlorine, Cl2, to produce chloroethane, C2H5Cl. (i) Outline why the reaction does not start unless the mixture is exposed to ultraviolet light. (ii) Deduce two propagation steps and one termination step for this…
Which equation represents a propagation step in the radical substitution of ethane by bromine? A. Br2 → 2 Br ⋅ B. ⋅ C2H5 + Br ⋅ → C2H5Br C. C2H6 + Br ⋅ → C2H5Br + H ⋅ D. ⋅ C2H5 + Br2 → C2H5Br + Br ⋅
Two observations are made about the halon CF2ClBr in the stratosphere. Which pair of statements explains the observations? Use section 12 of the data booklet. A. The C−Br bond has the highest bond enthalpy of the three carbon–halogen bonds;…
Ethane reacts with bromine gas, Br2(g), in the presence of UV light to form bromoethane. State the type of this reaction and the name of its mechanism.
How many structural isomers of dichloropentane, C5H10Cl2, can be formed by the free-radical substitution of CH3CH2CH2CH2CH3 with excess Cl2 in the presence of UV light? Ignore stereoisomers. A. 5 B. 7 C. 9 D. 12
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.