can you explain this Propylene oxide (2-methyloxirane or 1,2-epoxypropane) can be converted to 1,2-propanediol by the...
need help with 7and8 dont know how to do
Propylene oxide (2-methyloxirane or 1,2-epoxypropane) can be converted to 1,2-propanediol by the 7. action of either dilute acid or base in water. When optically active (R)-(+)-propylene oxide is used, the 1,2-propanediol obtained from the acid hydrolysis (HsO) has an optical rotation opposite from the alkaline hydrolysis (OH, H20). Write the stepwise mechanism of each hydrolysis that is likely to explain these facts. Use curved arrows to show the flow of electrons....
Hc VCH Draw the organic product formed when CH3CH2CH2OH is treated with each reagent. a H2S04 (180°C) d SOC12, pyridine Ig 1) NaH; 2) CH3CH2Br b NaH e PBr3 h 1) TSCI, pyridine; 2) NaSH c HBr f TsCl, pyridine 3. Draw the organic product formed when l-methylcyclohexanol is treaded with each reagent. In some cases, no reaction occurs. a KH c HBr Te NaHCO3 b Nacid HCI f 1) KH; 2) CH3CH2Br Draw two different routes to each of...
3. (4 pts) Complete the Fischer projection drawn below by adding the four substituents to the chiral carbon of (s)-2-methyl-3-bromo-hexane. 4. (4 pts) Draw a wedge and dash structure representing (1R 2R,3S)-1,2- dichloro3-ethylcyclohexane. 5. (4pts) 2-bromobutane is shown below. Is this (R)-2-bromobutane or (S)-2 bromobutane? 6. (6 pts) For each chiral carbon in ascorbic acid (vitamin C), shown below, assign Ror S to each stereocenter. How many stereoisomers of ascorbic acid are possible? OH HO ОН 7. (9 pts) (Are...
(d) Give the structures of the polymers which can be formed from the following monomers. HOOH + Ho но — он (iii) 4. (a) What is the general structure of an a-amino acid. (6) (b) Give an example of amino acids with (i) Hydrophobic, (ii) Polar (iii) acidic (basic) side chains (look up a reference). Ginecological chalins (cookeo 5. (a) What is the necessary and sufficient condition that a molecule is chiral (optically active)? (b) What is a stereocentre? How...
9. C (Z-2-hexene d. They are all of equal stability. Choose the most stable alkene among the following a 1-hexene b. (E)-2-hexene 10. What is the relation between an enantiomer's configuration and its specific rotation? (a) Rcompounds usually are dextrorotatory with few exceptions (b) R compounds always are dextrorotatory. (c) There is no relation. (d) R compounds always are levorotatory 11. How many chiral centers are there in tartaric acid, and how many different stereoisomers exist for this acid? он...
Please complete for Tuesday, we will go through the questions and mark them in class. pg 156 - 4.23, 4.24, 4.26 pg 170 - 4.29, 4.31, pg 171-4.36 pg 175 - 4.59 pg 176- 4.74, 4.75, 4.80 pg 177-4.81, 4.82 pg 188- 5.1, 5.4, 5.5, 5.6, 5.11 - Using Table 5.1 pg 198-5.22, 5.25 pg 203 - 5.29 pg 206 - 5.37 pg 209 - 5.39 pg 2.14 5.61 pg 235-6.11, 6.14, 6.16 156 CHAPTER 4 Introduction to Organic Compounds...