所屬科目：研究所、轉學考(插大)◆有機化學及無機化學
1. Rank the following compounds in decreasing values of pKa (from highest to lowest).
(A) I ＞ II ＞ III ＞ IV (B) IV ＞ III ＞ II ＞ I (C) IV ＞ II ＞ III ＞ I (D) III ＞ I ＞ II ＞ IV (E) I ＞ III ＞ II ＞ IV
2. What is the IUPAC name for the following compound?
(A) (S)-2-methyl-2-bromobutanone (B) (S)-2-bromo-2-methylcyclobutanone (C) (R)-2-bromo-2-methylcyclobutanone (D) (S)-1-bromo-1-methyl-2-cyclobutanone (E) (R)-1-bromo-1-methyl-2-cyclobutanone
3. Of the species listed below, select those less basic than acetylide. (A) BuLi (B) NaNH2 (C) NaOCH3 (D) both A and C (E) both B and C
4. Compound A on ozonolysis yields acetophenone and propanal. What is the structure of compound A?
(A) 2-phenyl-2-pentene (B) 1-phenyl-1-hexene (C) 1-phenyl-2-pentene (D) 2-phenyl-2-hexene (E) none of the above
5. Predict the product for the following reaction sequence.
(A)(B)(C) (D)(E)
6. Provide the reagent(s) necessary to convert toluene to benzoic acid. (A) 1. NBS, Δ; 2. NaOH (B) 1. KMnO4/NaOH/H2O; 2. H3O+ (C) HNO3/H2SO4 (D) 1. CO2; 2. H3O+ (E) none of the above
7. Which one of the following compound is aromatic? (A) (B) (C) (D) (E)
8. Predict the product when cyclohexanone reacts with aqueous sodium hydroxide at 100°C. (A) (B) (C) (D) (E)
9. Give the major product for the reaction below.
(A) (B) (C)(D) (E)
10. Provide the structure of reactant (X) for the following reaction.
(A) (B) (C) (D) (E)
11. Predict the major product for the following reaction.
(A)(B)(C) (D) (E)
12. Chloroquine is used as an antimalarial drug. Rank the three nitrogen atoms in decreasing (strongest to weakest) order of basicity.
(A) III ＞ I ＞ II (B) I ＞ III ＞ II (C) II ＞ I ＞ III (D) II ＞ III ＞ I (E) III ＞ II ＞ I
13. Predict the product for the following reaction.
14. Which of the following reaction shown below give the WRONG product? (A) (B) (C)(D) (E)
15. Choose the correct statement below:
(A) μ3-CO has higher IR stretching frequency (ν) than terminal CO does.
(B) The Ru-C distance of Ru(CE)x complexes (E=O,S,Se,Te) is the shortest when E=oxygen.
(C)Linear ν(N-O) in neutral molecules is usually lower than bent ν(N-O).
(D) Ni(CO)3(PCl3) has higher CO stretching frequency than Ni(CO)3(PPh3) (E) π-back bonding from CO will increase the ν(CO) in metal carbonyl complexes
16. Which of the following specifies the incorrect magnetic moments for the complex? (A) 4.9 BM for [Cr(H2O)6]2+ (B) 2.8 BM for [Cr(CN)6]4- (C)5.9 BM for [Fe(CN)6]3- (D) 2.8 BM for [Ni(H2O)6]2+ (E) 1.7 BM for [Cu(en)2(H2O)2]2+
17. Three separate solutions of [M(H2O)6]2+ complexes (M= Fe, Ni, and Cu) were mislabeled. In order to identify them, UV-Vis spectra were taken. Solution A has three ligand field bands. Solution B and C have only one band. Upon addition of excess CN-, the single band of Solution B shifts to higher energy while that of Solution C becomes multiband. Which of the following is correct? (A) M=Fe for Solution C (B) M=Ni for Solution B (C)M=Cu for Solution A (D) M=Cu for Solution C (E) M=Ni for Solution A
18. Choose the correct statement below: (A) Pure silicon is an insulator at room temperature (B) Metal has fully filled conduction band (C)Adding phosphorus in silicon makes an n-type semiconductor (D) Germanium is a p-type dopant for silicon semiconductor (E) Adding n-type dopant lowers the Fermi level
19. Which of the following name is incorrect ? (A) dicyanotetraкis(methylisocyano)iron(II) for [Fe(CN)2(CH3CN)4] (B) pentaamminenitridocobalt(III) sulfate for [Co(N3)(NH3)5]SO4 (C)tris(2,2'-bipyridyl)nickel(II) bromide for [Ni(bipy)3]Br2 (D) sodium tris(oxalato)vanadate(III) for Na3[V(C2O4)3] (E) potassium tetrachloroferrate(III) for K[FeCl4]
20. The enthalpy change for a reaction can be obtained by: (A) slope from plot of lnKeq vs. T (B) slope from plot of ln(1/Keq) vs. T (C)slope from plot of ln(1/Keq) vs. 1/T (D) slope from plot of lnKeq vs. 1/T (E) -RT(lnKeq)
21. What is the bond order and magnetism for Rh2(μ-CH3COO)4Cl2: (A) 3 bonds, paramagnetism (B) 2.5 bonds, paramagnetism (C)3 bonds, diamagnetism (D) 1.5 bonds, paramagnetism (E) 2 bonds, paramagnetism
22. Which statement about the thiocyanate ion, SCN-, is true? (A) Its Lewis structure contains an unpaired electron (B) Its shape is bent like that of H2O (C)Only two correct resonance structures can be drawn (D) There are more than two sigma bonds in the ion (E) The formal charge on S can be +1, 0, -1
23. The predicted ligand dissociation rate (L= phosphine or phosphite) for
cis-Mo(CO)4L2 + CO → Mo(CO)5L + L is (A) higher for PPh3 than P(n-Bu)3 (B) higher for PPh3 than P(p-CF3C6H4)3 (C)slower for PPh3 than P(OPh)3 (D) slower for PPh3 than PMe2Ph (E) None of the above
24. According to selection rule, which of the following statement is correct ? (A) d→d transition is forbidden because it is u→u symmetry (B) s→p transition is allowed because it is u→g symmetry (C)Td complexes has stronger absorptions (ε coefficient) than that of Oh complexes (D) ΔS=±1 (E) ΔL=0
25. Which electronic configuration for Oh geometry is not expected to have Jahn-Teller effect? (A) high spin d4 (B) high spin d9 (C)low spin d7 (D) low spin d5 (E) low spin d6
26. Which compound can not be the metathesis product of MeCH=CHD and MeCD=CHD? (A) CHD=CHD (B) MeCH=CDMe (C)MeCH=CHMe (D) MeCH=CD2 (E) MeCD=CDMe
27. Which of the following has the weakest bond? (A) S2+ (B) S2 (C)S2- (D) O2 (E) O2-
28. For Infrared spectra, which statement below is correct ? (A) trans-Mo(CO)2(PMe3)4 has one CO IR active stretching signal (B) symmetric stretching of cis-Mo(CO)2(PMe3)4 is IR inactive (C)CO ligand has higher frequency than CN- ligand (D) Terminal CO ligand usually has lower frequency than bent NO (E) fac- and mer-Mo(CO)3(PMe3)3 cannot be distinguished by IR
29. Choose the correct statement below: (A) F2 has higher bond energy than Cl2 (B) Si=Si bond is stronger than C=C bond (C)Bond angle of NH3 is larger than that of PH3 (D) SiO2 forms single bond only while CO forms double bond. (E) The ground state of oxygen is singlet
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2. The scheme below shows some reactions of cyclohexene. Suggest appropriate reagents for Step А, В, C and D (more than one step may be required).
(a) [XeF5]- anion,
2. Explain why when blue CoCl2 (in the form of Co[CoCl4]) absorbs water and the color changed to pinkish red.
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(A) I ＞ II ＞ III ＞ IV (B) IV ＞ III ＞ II ＞ I (C) IV ＞ II ＞ III ＞ I (D) III ＞ I ＞ II ＞ IV (E) I ＞ III ＞ II ＞ IV
(A) (S)-2-methyl-2-bromobutanone (B) (S)-2-bromo-2-methylcyclobutanone (C) (R)-2-bromo-2-methylcyclobutanone (D) (S)-1-bromo-1-methyl-2-cyclobutanone (E) (R)-1-bromo-1-methyl-2-cyclobutanone
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(A) III ＞ I ＞ II (B) I ＞ III ＞ II (C) II ＞ I ＞ III (D) II ＞ III ＞ I (E) III ＞ II ＞ I
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