Zadanie 2f
Wzorowane na: Chemistry HL Paper 2, May 2024, TZ1, pytanie 2(f). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Butan-1-ol can be produced from 1-bromobutane.
(i) Identify a nucleophile that would convert 1-bromobutane into butan-1-ol.
(ii) Using curly arrows, sketch the mechanism for the reaction of 1-bromobutane with the nucleophile you identified in (i).
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) OH− ✔
(ii) curly arrow from the lone pair / negative charge on the oxygen of OH− to the carbon bonded to bromine ✔
curly arrow from the C-Br bond to the bromine atom ✔
transition state drawn in square brackets, with a negative charge outside the bracket, partial bonds between O and C and between C and Br, and the carbon bonded to three other groups: [HO⋅⋅⋅CH2(C3H7)⋅⋅⋅Br]− ✔
Schemat punktowania
(i) [1]; accept hydroxide, sodium hydroxide, NaOH, or water, H2O. (ii) The hydroxide ion must show a negative charge and a lone pair for M1. M3 is lost if the O-C bond in the transition state is drawn as a full bond. If water was chosen in (i), apply the same marking points to the corresponding mechanism, with the charge of the transition state adjusted to the species.