2. Below are two sets of chemical structures of hypothetical bioresorbable polymers. Within the set, order the polymers in terms of degradation rate (from fast two slow) with explanation. Set I @ fo-cu-cy-ox_-²) @ fy-cu-cu-cu-²7₂ assume same (3 4 crystallinity) @ to-8-cm₂-i-tx to-c-c₁-cu-c²-²) ² Set IⒸ (N-CH₂-CH₂- Ⓒto-cu-g=²), CH 3 -CH₂ to-cu-cu-t₂ @to-che-en-Ho-en-8-17, random co-polymer Y
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- A. Why does acrylic acid polymerization under radical conditions work so well? Explain. B. Predict the impact of using the crosslinker shown below, instead of MBA, on the hardness/rigidity of the polymer. Explain.I’m currently trying to write a lab report for the synthesis of dimolybdenum tetraacetate [Mo2(O2CCH3)4] from the reaction of molybdenum hexacarbonyl, Mo(CO)6 in glacial acetic acid and acetic anhydride under a nitrogen atmosphere, involving the difficult formation of a quadruple bond and requires high heat and long reaction time (approximately 20 hours). But these are the question I’m stumped on: 1. Why need the reaction be done under nitrogen? We also added dichlorobenzene and hexanes during the reaction. 2. Explain the purpose of dichlorobenzene and hexanes. 3. Why does the reaction take 20 hrs?According to this video, https://www.youtube.com/watch?v=9Ng6Zv9oLzk, draw the dienophile that was used in the example explaining s-cis and explain what is different about this dienophile from common examples?
- Given this organic synthesis, is there any limiting and excess reagents? also describe the procedure is run, how is the reaction monitored?Is the order fo addition important? N-ETHYLALLENIMINE[Aziridine, 1-ethyl-2-methylene-] Submitted by Albert T. Bottini and Robert E. Olsen1.Checked by Thomas H. Lowry and E. J. Corey. 1. ProcedureCaution! This preparation should be carried out in a good hood to avoid exposure to ammonia. The operator should wear rubber gloves and protective goggles because 2-haloallylamines and ethylenimines can cause severe skin and eye irritation. A 2-l. three-necked flask is fitted with a sealed mechanical stirrer, a gas-inlet tube, and a dry ice condenser protected from the air by a soda-lime drying tube (Note 1). The system is flushed thoroughly with dry ammonia, and 32.8 g. (0.84 mole) of sodium amide (Note 2) is added to the flask. The system is again flushed with ammonia, the condenser is provided with dry ice covered by acetone, and 1.2 l. of liquid…Useful Information: sodium metam: Commercial grade sodium metam is 33% pure sodium metam by weight and has a density of 1.2 g/mL. Hydrolysis of metam (Methyl isothiocynate) + H2S Rate constants for hydrolysis for metam (base catalyzed hydrolysis is negligible) = 300 mol -1 L. sec -1 , = 1 x 10-8 sec-1 Metam also undergoes photolysis to methyl isothiocyanate with a half-life of 1.6 hrs. Data for Sacramento River discharge Q = 75,000 L/min mean depth = 0.30 m pH = 7.8 mean width = 3.2 m dispersion coefficient D = 1.6 x 102 m2/min Assuming the spill acts acts as a single point source. How long does it take for the maximum contaminant concentration to get to Lake Shasta? If Na+ acts as conservative (i.e., it is not transformed) tracer, calculate the maximum concentration (in g/L) at Lake Shasta. (Hint: remember that sodium only constitutes a…1.- How does the molecular weight change vs % conversion in a step polymerization? Explain this behavior and why does it occur? 2.- Name at least 3 requirements for obtaining a high molecular weight polymer by step polymerization. 3.- How can you minimize cyclization reactions in a step polymerization? Explain with equations and narrative Why do you want to minimize cyclization? Is it possible to eliminate cyclic products completely?
- One possible way of determining the identity of an alkene, is to let itundergo an oxidative cleavage reaction in the presence of hot basicpotassium permanganate. You are given two containers said to containdifferent alkenes. Container A is marked as cis / trans‐2‐butene andcontainer B as 2‐methyl‐1‐butene. Explain by referring to the formation ofproducts, how you would verify the identity of the alkenes.3.- Explain the variables in the Carothers equation, and its physical meaning. How can this equation be used to control a step polymerization and its molecular weight? 4.- Explain why an acid catalyzed polyesterification proceeds at a faster rate than a non-catalyzed polyesterification. Use: a) mechanism of the reaction from a synthetic perspective, and b) Carothers equation to start your discussion, followed by any other equation that explains it from a kinetic standpoint.Please show the product and mechanism for the cationic polymerization of 2-butene using BF3/H2O to catalyze polymerization. Do you expect this to be an effective polymerization strategy for this monomer? Why or why not?
- describe the mecanisme of cyclopentane monobromation in the correct order Need solution asapHow the rate of reaction is affected by phenomenon of selectivity with at least 3 examples.Give a single benefit for each polymerisation from carrying them out under a nitrogen atmosphere? (d) Of the two polymers produced (A and B) one had Mn = 12,000 and a polydispersity of 1.1 and one a Mn = 11, 200 and a polydispersity of 1.7. Identify which set of molecular weight parameters corresponds to which polystyrene sample.