Zadanie 5h
Wzorowane na: Chemistry HL Paper 2, May 2024, TZ2, pytanie 5(h). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
1-Bromopropane reacts with aqueous sodium hydroxide to give propan-1-ol.
(i) Identify the type of mechanism for this reaction.
(ii) Explain the mechanism, using curly arrows to show the movement of electron pairs.
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) SN2 ✔
(ii) curly arrow from the lone pair on O in OH− to the carbon atom bonded to Br AND curly arrow from the C-Br bond to Br ✔
transition state with OH and Br on opposite sides of the carbon atom, partial bonds to both, in square brackets with a negative charge ✔
CH3CH2CH2OH AND Br− as the products ✔
Schemat punktowania
(i) [1]. (ii) [3]. A curly arrow for Br- leaving, drawn within the transition state, is accepted. A correctly drawn S_N1 mechanism earns [2] at most. The 180° arrangement of OH and Br need not be shown exactly.