Give the structural formula of the compounds K to M. (МеO),CH DIBAH, -78°C 30 min CSA, CH,Cl2 → K OH L rt, 24 h 0°C, 10 min HO (1) Excess NaH THF, 0°C M Br- (2)
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- 1: In the sweetening MEROX process for kerosene the mercaptans are converted into (a) Sulpher (b) Disulphide (c) Hydrogen sulphide (d) None of these 2: Which of the following products contain maximum sulphur? (a) Diesel fuel (b) Fuel oil (c) Jet fuel (d) LPG 3: Which of the following petroleum product has a maximum C/H ratio (by weight)? (a) Light diesel oil (b) Fuel oil (c) Naphtha (d) Heating oil 4: Which of the following hydrocarbon are most desirable in gasoline? (a) Paraffins (b) Isoparaffins (c) Naphthenes (d) Aromatic 5: Octane no. of paraffins: (a) Remain constant with change in the number of carbon atoms (b) Increases with increase in the number of carbon atoms (c)Decreases with increase in the number of carbon atoms (d)None of the above 6: Which of the following hydrocarbons has a maximum octane number? (a) Benzene (b) Cyclohexane (c) Hexane (d) Iso-hexane 7: Which of the following petroleum products has a minimum flashpoint? (a)Gasoline (b) Kerosene (c) Fuel oil (d) Heating…6, The structure originelly proposed For Cordycepic acid, [a] +40.3°, has been + 40.3°, has been shown to be in Correct, suggest to be reason skeptical obout the original Structure, which is given below CO2H 1.29 HO HO.Another reagent that can be used to convert carboxylic acids into acid chlorides is phosphorus trichloride (PCI3), as shown in the scheme below. :0: :0: :ö: PCI2 + -PCI2 H. H :O: + НОРCI2 The mechanism, for the reaction, is shown above but the curved arrows and the formal charges, on the respective atoms, have been omitted. (a) Draw the missing curved arrows for each step (b) Supply any missing formal charges
- O.002015 mol 4. For the acid in Option do the following: HO,CCH,C H2 CH,CO2H a) Draw a Lewis structure of the acid and mark the acidic hydrogen(s) with an asterisk (*). (Hint: Organic acids, those composed of C. H. and 0, will have the partial structure "HO2C-" or "-CO2H" written in the formula, In these cases, both oxygens are bonded to the carbon and the hydrogen is bonded to one of the oxygen atoms) b) Draw a structure of the conjugate base of the acid you drew in 4a) c) Draw a structure of the conjugate base of the species for which you drew a structure in 4b) d) Which of the structures you've draw above (4a, 4b, or 4c) can act as both an acid and a base? Write appropriate chemical equations to explain your answer. Xavier University of Louisiana 176(2) jlibäi In the following image these two compound CH,CH, C=C H CH,CH, CH,CH, C=C CH,CH, (A) H H H. (8) A is Cis-compound and B is Trans- Compound A is Trans-compound and B is Cis- compoundWrite the contributing resonance structures and resonance hybrid for each of the following: (a) CH;CH=CH-CH=OH (f) CH3 (b) CH2=CH-CH-CH=CH2 (g) CH3-S-CH, (h) CH3-NO, (d) CH2=CH-Br CH, (e)
- 2. Given the following: NaOH (c) H₂O (a) NH3 The Lewis Base(s) is(are) (b) NaOH (c) H₂O b (f) a &c (g) b & c (d) BH3 (d) BH3 (b) (a) NH3 (e) a & (h) a-c (i) a-dComplete the scheme, write formulas: S CISO3H - 15°C konc. HNO3 H₂O A B C4H3NSO₂ 40°C to4. Given the following: NaOH (c) H₂O The Lewis Acid(s) is(are) (b) NaOH (c) H₂O (d) NH3 & b (f) a &c g Oh a (a) BF3 (b) (d) NH3 Of (g) b & c (a) BF3 (e) a (h) a-c (i) a-d
- ontent/2973671/viewContent/1868045/View a) CH;SH + H,0 CH;S + H3O* b) CH;CH,NH, + H2O CH;CH,NH, + OHS + Ozle) → SO26) 2 SO2e) + 02 ) → 2 SO31@) SO3e) + H2SO4laq) → H;S;O7(aq) H;S;O7(a) + H2O) → 2 H;SO(aq) (a) What is the oxidation number of S on the products of the first and second equations above? (b) What is being reduced in the second equation? (c) H2S,0, is known as oleum. What is the oxidation state of sulphur in this compound? (d) Is the fourth equation a redox equation? Explain your answer.(5) (6) (7) 요 Ph CO₂Me ? Et₂NH, NaBH4 NH₂ Br2, NaOH H₂O OH