Zadanie 4d
Wzorowane na: Chemistry SL Paper 2, May 2022, TZ2, pytanie 4(d). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Informacja do zadań 4a-4e.
Carbon occurs as several allotropes and forms an enormous variety of organic compounds.
Polecenie
(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).
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) all atoms and all bonds shown: a chain of six carbon atoms with a double bond between C3 and C4, and each carbon atom carrying the right number of hydrogen atoms (3, 2, 1, 1, 2, 3 from C1 to C6; twelve C–H bonds in total) ✔
(ii) CH3CH2CH=CHCH2CH3 + HBr → CH3CH2CHBrCH2CH2CH3 ✔
(iii) «electrophilic» addition ✔
Schemat punktowania
(i) [1]; every C–H bond must be drawn, a condensed or skeletal formula scores zero; accept either arrangement of the groups around the double bond. (ii) [1] for the correct reactants and product; accept molecular formulas C6H12 + HBr → C6H13Br. (iii) [1]; do not accept nucleophilic or free-radical addition.