(b) Ozonolysis process was carried out towards an unknown organic compound, X, to produce propanal, C3H¢O and compound Y. Propanal was then further oxidized into compound z, C3H6O2 by using potassium permanganate, KMNO4 under acidic condition and heating. As an alternative, compound Y can be produced from the reaction of benzene with ethanoyl chloride, CH3COCI with the presence of aluminium trichloride, AICI3. Proses ozonolisis telah dijalankan terhadap sebatian organik yang tidak dikenali, X untuk menghasilkan propanal, C3H6O dan sebatian Ý. Propanal kemudiannya dioksidakan menjadi sebatian Z menggunakan KMNO4 dalam keadaan berasid dan panas. Sebagai alternatif, sebatian Y boleh dihasilkan daripada tindak balas antara benzena dengan etanoil klorida, CH3COCI dengan kehadiran aluminium triklorida, AICI3. (1) Draw the structural formula of compounds X, Y, and Z. Lukiskan formula struktur bagi sebatian X, Y, dan Z. (ii) Show the formation of electrophile that will be reacted with benzene for the formation of compound Y. Tunjukkan pembentukkan elektrofil yang bertindak balas dengan benzene bagi pembentukkan sebatian Y. (iii) What is the name of reaction to convert benzene into compound Y? Apakah nama tindak balas untuk menukarkan benzena kepada sebatian Y?

Compound A of molecular formula C8H₁4 is reduced by sodium in liquid ammonia to give compound of molecular formula C8H16. product (Y). Both A and B undergo hydrogenation in the presence of a platinum catalyst to give 2,5- dimethylhexane. Ozonolysis of B with an oxidative workup produces a carboxylic acid of molecular formula C4H8O2. Reaction of B with a peroxyacid gives a chiral C8H₁40 product, but reaction with bromine gives an achiral C8H₁4Br2 product. What are the identities of A and B? 14 A is 2,5-dimethyl-3-hexyne; B is cis-2,5-dimethyl-3-hexene A is 2,5-dimethyl-3-hexyne; B is trans-2,5-dimethyl-3-hexene A is 2,5-dimethyl-1,5-hexadiene; B is 2,5-dimethyl-3-hexyne A is 2,5-dimethyl-2,4-hexadiene; B is cis-2,5-dimethyl-3-hexene

A8

Write the equilibrium-constant expressions and obtainnumerical values for each constant in. (a) the basic dissociation of aniline, C6H5NH2. (b) the acidic dissociation of hypochlorous acid,HClO. (c) the acidic dissociation of methyl ammoniumhydrochloride, CH3NH3Cl. (d) the basic dissociation of NaNO2. (e) the dissociation of H3AsO3to H3O+and AsO33-. (f) the reaction of C2O42-with H2O to give H2C2O4and OH-.     show solution