Your friend need to purify a sample left behind by an older graduate student to isolate the aminonapthalene derivative A. Knowing the content of the sample, your friend suggested a rapid liquid-liquid extraction to purify up the sample. NH2 ОН A 1M NaOH ELOAC Aqueous Organic NH INaHCOз ELOAC Aqueous Organic NH2 Final organic phase Your chemical intuition tells you this plan is wrong.
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- 1) A polyester made from sebacic acid (CAS# 111-20-6) and 1,6-hexanediol (CAS# 629-11-8) has the molecular weight fractionation listed below. Calculate an appropriate average molecular weight for this polyester. Source: Batzer, H., Macromolecular Chemistry and Physics 5Following is a retrosynthetic analysis for the anthelmintic (against worms) diethylcarbamazine. N. `NET2 N. OEt Me Me Diethylcarbamazine (A) (2) OH MENH, CI OEt Me OH Me Methylamine Ethylene (C) (В) Ethyl oxide chloroformate Diethylcarbamazine is used chiefly against nematodes, small cylindrical or slender threadlike worms such as the common roundworm, which are parasitic in animals and plants. Given this retrosynthetic analysis, propose a synthesis of diethylcarbamazine from the three named starting materials.Enter the IUPAC name for the compound shown below:
- Which method can be used to prepare CH3CH2CH2CH2NH2? NH3 (large excess) (a) CH3CH2CH2CH2B. (1) NaCN (2) LİİAIH, (3) H20 (b) CH3CH2CH2B NH3, mild acid (c) CH3CH2CH2CHO NABH3CN or NABH4 (d) All three methods would work. Answer (a)The purpose of this experiment is to use both extraction and crystallization techniques to separate a solid mixture of organic compounds. You will receive a packet with 1 g of a unknown (pH is basic) amide solid sample which will contain three components, one from each group: Group 1 (~50% wt): ethyl 4-aminobenzoate, ortho-toluic acid, or benzoic acid Group 2 (~40% wt): fluorene, 1,4-dibromobenzene, benzil, benzoin Group 3 (~10% wt): fluorene, 1,4-dibromobenzene, benzil, benzoin (but not the same as Group 2 compound) Create a lab procedure that will allow you to successfully isolate, purify, and identify the two major (Group 1 and Group 2) components of the unknown amide sample. reagents that can be used are 1M HCl, 6M HCl, 1M NaOH, 6M NaOH, diethyl ether, and methylene chloride6. (Chapter 15 - 47b) An aromatic compound, C9H12 has the following H NMR spectrum and a peak at 750 cmt in its IR spectrum. Answer the following questions. Chem. shift Rel. area 1.19 2.31 2.64 7.13 1.50 1.50 1.00 2.00 TMS 10 3 O ppm Chemical shift (6) 4(a). The IR peak at 750 cm in its IR spectrum indicate that the compound is. disubstituted = 4(b) The name of the compound is = Intensity-
- An organic chemistry laboratory Extraction; the extraction of crude naphtalene- benzoic acid mixture. Naphthalene is a suspect carcinogen and is toxic to aquatic life. Find an alternative pair of molecules that adhere better to the principles of green chemistry and can be separated by extraction using green' solvents. (kindly answer fully)A student was performing an acid-base extraction of a mixture of three compounds. The three compounds in the mixture are shown below. The mixture was extracted wilth 6 M HCI three times. The combined extractions were put into a flask marked A, which was treated with 1 M NAOH till it turned basic. This was then evaporated to obtain a crystal, which we label A. The remaining mixture was extracted with 6 M NaOH three times. The combined extractions were put into a flask marked A, which was treated with 1 M HCI till it turned acidic. This was then evaporaled to obtain a crystal, which we label B. The remaining mixture was evaporated to obtain a crystal, which we label C. The identity of A is Select] The identity of B is (Select) The identity of Cis Select] OH NH2 3A student was trying to determine the identity of an unknown compound. The melting point of the compound was 117-118oC. The student narrowed the possible compound down to the following: Compound Melting Point Range acetanilide 113-115oC fluorene 114-116oC mandelic acid 120-122oC A second student, doing the same experiment as above, found that their melting point was 100-108oC. What is wrong with the student’s melting point? Propose two reasons why the melting point could be incorrect. View keyboard shortcuts
- You need to recrystallize compound A. You are given several solvents to choose from. Briefly describe an experiment to determine what solvent is the best choice to recrystallize compound A.You are given a mixture containing the three compounds shown below. Outline a procedure using a flow chart for the separation and isolation of all three compounds, using acid-base extractions. All three are solids at room temperature and are insoluble in deilonized water. You have access to all standard laboratory glassware and equipment, and the standard lab chemicals. .CO2H O,N. „NH2 HO2C napthalene terephthalic acid 3-nitroaniline1. To pass Chem 18.1, ELIBAP must be able to determine the melting points of three ester compounds extracted and purified from three different plants. Ester 1 Ester 2 Ester 3 :0: H. MW: 182.17 g/mol MW: 152.15 g/mol MW: 164.20 g/mol Possible Melting Points: -31 °C 64-67 °C -9 °C a. Given the molar mass and molecular structures of the esters, determine their most possible melting points. b. According to her friend who took Chem 18.1 last semester, one of the ester compounds exists as a solid above room temperature (25 °C) while the rest remain in their liquid forms. Identify the ester which is present in solid form above room temperature. Draw the structure.