Organic Chemistry
Isomerism
28. How many of the following reaction will lead to the formation of Cis (2) alkene only? Br H R. Ph Nai -Phacetone H- Br Ph Br H Nal Ph acetone H Br H Ph- Br R. Nal acetone Br H Ph Br Jakash H Ph Nal R: DBYJU'S H Br Ph Br H CH, | CHO Naº R: H CH, CHOH Br CH R: + CHO Na". -H CHOH CH, CI D R. ot CH CHO Nan D CH,OH Phi
On the diagram below, draw a reaction that satisfies the following criteria. a. The reaction is endergonic. b. The reaction proceeds through a single transition state and has no intermediates. c. The reaction has a catalyzed pathway that has three transition states and two intermediates. d. The catalyzed pathway's first step is the fastest, and the second step is the rate- determining step AG reaction coordinate
Boat and chair conformer of cyclohexane are free from angle strain but boat is still unstable than the chair form due to the Non-eclipsing interaction Staggered conformer of boat form Flag-pole repulsion Abnormal bond length
QUESTION 13 Which Haworth projection corresponds to this Fischer projection? CHO HO -H H- -OH HO -H Ha OH CH2OH b, a. OH H H OH OH O HO HO HO H H H OH H H OH OH OH OH OH c. H OH d. OH O H H OH HO HO OH H OH OH H H H
Which choice correctly assigns the EIZ configuration of each alkene (I-III) shown below? H3C H3CH2C CI H2N 0 H OH NCH2C NHCH3 (H3C)2HC Br H3CO o H3CO I II III 1 = V ; Il = III = choose your answer... choose your answer... choose your answer... choose your answer... N Next E
3. Which of the following pairs of compounds could be used as the basis for a Diels. Alder synthesis of the compound shown below? CO CH CO CH 1 2 CH CH=CHCH 11 CH=CHCOCH III CH CH=CH CO CH IV + CH, CHCO,CH A) B)11 C) 111 D) IV E) More than one of the above
Question 14 (1 point) A gas canister has at a constant volume of 15.0 L. Initially, the canister is pressurized to 1,445 torr. Then, the gas inside is cooled from 300 K to 89.7 K. What is the new pressure of the gas? Your Answer: Answer units Question 15 (1 point) A gas canister has at a constant volume of 30.0 L. Initially, the canister is pressurized to 1,313 torr. Then, the gas inside is cooled from 75°C to 7.5°C. What is the new pressure of the gas? Your Answer: Answer units Question 16 (1 point) A balloon is held at a constant pressure of 1.09 atm. The balloon has a volume of 1.43 L. Then, the gas inside is cooled from 300 K to 260 K. What is the new volume of the gas? Your Answer: Answer units Omestion 17.11 nointi
28. Calcium cyanamide reacts with water to form calcium carbonate and ammonia. CaCN2(s) + 3H2O(1) - CaCO3(s) + 2NH3(g) a. How many grams of H20 are needed to react with 75.0 g of CaCN2? b. How many grams of NH3 are produced from 5.24 g of CaCN2? C. How many grams of CaCO3 form if 155 g of H2O reacts? 5
A Land estion 19 Wat is the relationship between alcohols I and I? They are: OH o Constitutional isomers Identical O Diastereomers O Enantiomers O Conformers Question 20 3 pts ich product(s) would you expect to obtain from the following sequence of reactions?
3. Fill the blank by selecting a name for just write the applicable letter) from the left column: (4 pts) 1) Act as catalysts during digestion speeding up hydrolysis of carbohydrates, A) Proteins lipids and proteins B) Triglycerides 2) Most prevalent and important monosaccharide in human body. Known as Blood sugar C) Cellulose, fiber 3) Formed by chains of aminoacids. They are the main structural components of muscles, skin and cartilages D) Glucose 4) Most abundant lipids in cell membranes 5) A polysaccharide formed by plants. Humans cannot digest it. E) Soaps it passes unchanged through digestive track F) Lactose 6) A polysaccharide formed by plants, during human digestion it produces large quantities of glucose units G) Enzymes 7) It is formed by glycerol and three fatty acids H) Starch 8) Are formed by chemical reaction of fatty acids with strong bases such as NaOH 1) Glycerophospholipids 9) A disaccharide found in milk and milk products that contains glucose and galactose
4. Draw all possible Newman projections for 2,2,3,3-tetramethylbutane, looking down carbons 2 and 3, rotating every 60°. Draw the potential energy diagram and calculate the energy of each conformation using the values below (10 pts). H eclipse 4.0 kJ/mol eclipse 6.0 kJ/mol CH3 CH3 I IŠ Š H3C. CH3 CH3 CH3 CH3 CH3 eclipse 11.0 kJ/mol H3c gauche 3.8 kJ/mol CH3 CH3
4. Draw all possible Newman projections for 2,2,3,3-tetramethylbutane, looking down carbons 2 and 3, rotating every 60°. Draw the potential energy diagram and calculate the energy of each conformation using the values below (10 pts). H H eclipse 4.0 kJ/mol eclipse 6.0 kJ/mol H CH3 CH3 H3C CH3 CH3 CH3 CH3 eclipse 11.0 kJ/mol gauche 3.8 kJ/mol oo H3C CH3 CH3 CH3
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