Zadanie 5a
Wzorowane na: Chemistry HL Paper 2, May 2022, TZ1, pytanie 5(a). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Informacja do zadań 5a-5c.
Organomagnesium compounds react with carbonyl compounds. In one overall reaction, Compound A reacts with methylmagnesium iodide, CH3MgI, and then with water:
Compound A + CH3MgI + H2O → Compound B + Mg(OH)I
Polecenie
(i) State the IUPAC name of Compound B.
(ii) Both compounds are liquids at room temperature. Identify the strongest intermolecular force between molecules of Compound B.
(iii) State how many σ (sigma) bonds and how many π (pi) bonds one molecule of Compound A contains.
(iv) Deduce the hybridization of the carbonyl carbon atom in Compound A and of the carbon atom in its CH2 group.
(v) Identify a primary alcohol that is an isomer of Compound B and exists as optical isomers (enantiomers).
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) 2-methylbutan-2-ol / 2-methyl-2-butanol ✔
(ii) hydrogen bonding ✔
(iii) σ: 12 AND π: 1 ✔
(iv) carbonyl carbon: sp2 AND CH2 carbon: sp3 ✔
(v) 2-methylbutan-1-ol / CH3CH2CH(CH3)CH2OH ✔
Schemat punktowania
Each of (i)-(v) scores [1]. (i) Accept methylbutan-2-ol; do not accept 2-methylbutanol. (ii) Neither van der Waals' forces nor dipole-dipole forces is acceptable. (iii) Both numbers are needed. (iv) Both hybridizations are needed. (v) Accept the structural formula.