Zadanie 39
Which reaction will be fastest when a halogen is substituted by aqueous hydroxide ions? A. (CH3)2C(F)CH2CH2CH3 B. (CH3)2C(Cl)CH2CH2CH3 C. (CH3)2C(Br)CH2CH2CH3 D. (CH3)2C(I)CH2CH2CH3
Leaving groups and rates of nucleophilic substitution
Predict and explain the relative rates of substitution for chloroalkanes, bromoalkanes and iodoalkanes: the weaker the carbon-halogen bond and the more stable the leaving anion, the faster the reaction, so iodoalkanes react fastest.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 8 Otwórz w wyszukiwarce z filtrami
Zadanie 4d
The rate of the reaction between compound Y and aqueous sodium hydroxide depends on the concentrations of both reactants. (i) Explain the mechanism of this reaction, using curly arrows to show the movement of electron pairs. (ii) Explain why…
Zadanie 8d
When 1-bromopropane is warmed with aqueous sodium hydroxide, NaOH(aq), propan-1-ol is formed. (i) State the name given to this reaction's mechanism. (ii) Draw the structure of the transition state that occurs during this mechanism. (iii) Deduce the rate…
Zadanie 4c
Iodoethane can react with aqueous hydroxide ions to produce ethanol. CH3CH2I(l) + OH−(aq) → CH3CH2OH(aq) + I−(aq) (i) State what type of reaction this is. (ii) Using curly arrows to show the movement of electron pairs, sketch the mechanism of this…
- Materiał graficzny
Zadanie 38
Which halogenoalkane undergoes nucleophilic substitution with aqueous hydroxide ions at the lowest rate? A. 1-bromopropane B. 1-chloropropane C. 1-fluoropropane D. 1-iodopropane
Zadanie 35
Which reaction would be the fastest under the same conditions? A. CH3CH2CH(Cl)CH3 + OH− B. CH3CH2C(CH3)2Cl + OH− C. CH3CH2CH(I)CH3 + OH− D. CH3CH2C(CH3)2I + OH−
Zadanie 35
Which of these halogenoalkanes reacts fastest with aqueous hydroxide ions by an SN1 mechanism? A. CH3CH2CH2CH2Br B. CH3CH2CH2CH2I C. (CH3)3CBr D. (CH3)3CI
Zadanie 6e
State, with a reason, how the rate of reaction of hydroxide ions with 2-iodopentane compares with the rate of their reaction with 2-bromopentane under the same conditions.