1. Predict the major product of the following reactions (if applicable) and propose a mechanism for the reactions below. a. b. C. d. e. CI CI IZ O 1) IBUOK / IBUOH tBuOK / tBuOH NaN3 H₂O, cat. H₂SO4 Br2, CCI4 (Hint: has similar reactivity as ROH) Br OH (±)
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- Describe how the product is purified. 4,4'-DIBROMOBIPHENYL [Biphenyl, 4,4'-dibromo-] Submitted by Robert E. Buckles and Norris G. Wheeler1. Checked by R. S. Schreiber, Wm. Bradley Reid, Jr., and Robert W. Jackson. 1. Procedure In a 15-cm. evaporating dish is placed 15.4 g. (0.10 mole) of finely powdered biphenyl (Note 1). The dish is set on a porcelain rack in a 30-cm. desiccator with a 10-cm. evaporating dish under the rack containing 39 g. (12 ml., 0.24 mole) of bromine. The desiccator is closed, but a very small opening is provided for the escape of hydrogen bromide (Note 2). The biphenyl is left in contact with the bromine vapor for 8 hours (or overnight). The orange solid is then removed from the desiccator and allowed to stand in the air under a hood for at least 4 hours (Note 3). At this point, the product weighs about 30 g. and has a melting point in the neighborhood of 152°. The crude 4,4'-dibromobiphenyl is dissolved in 75 ml. of benzene, filtered, and cooled to 15°. The…(a) Illustrate the following name reactions giving suitable example in each case :(i) Clemmensen reduction (ii) Hell-Volhard-Zelinsky reaction(b) How are the following conversions carried out?(i) Ethylcyanide to ethanoic acid (ii) Butan-l-ol to butanoic acid(iii) Benzoic acid to m-bromobenzoic acidcan i get help drawing out actual structures including the nucleophilic addition of Cy2NH to parafomaldehyde and its hemiaminal intermidiate and the condensation step when it is displaced by terminal alkyne forming allene, also what is dioxane getting rid of as the solvent, thanks
- Can someone explain the answers to 28, 29, and 30? The answers are B, A, A. I understand lindar catalyst makes cis alkenes and Na/NH3 makes trans alkenes but I dont understand how the second step of Br2, OsO4 influences the stereochemistry between the 2 . Will rate quickly if helpful. Thanks!Suggest an explanation for the observed order of SN1 reactivity of the following compounds. Want solution ASApWhy cis-Ru(II)Cl2(DMSO)4 reacts with pyridine, et cetera, to give substitution of the DMSO but not the chloride ligands, but trans-Ru(II)Cl2(py)4 react with suitable Na+ and K+ salts in aqueous pyridine to afford chloride-substituted derivatives. write the reactions equations.
- EXPLAIN BY WORDS IN ORDER FOR ME TO UNDERSTAND THE GENERAL REACTION SCHEME. IN THIS CROSS-COUPLING REACTION WHICH ORGANOHALIDE (R-X) REACTS WITH ORGANOBORANE [R1B(OR)2].Explain the following terms, make sure to include chemical structures as examples. a.) Syn-addition b.)Zaitsev product c.)Concerted(relating to hydroborations or SN2 reactions)Please propose a synthesis of the target molecule using as many steps or reagents and answer these questions. 1. Why use chemoselectivity as the functional group and not another? 2. Why regioselectivity? 3. Why stereoselectivity? 4. What are the changes in the oxidation state?
- 1. In which of the following tests/reagents would cyclohexene and hexane both yield a positive result? I. t-BuCl in AlCl3 II. Br2 in light III. Halogenation by I2 in KI IV. KMnO4 2. Which of the following is statements is/are TRUE about the experiment on the relative rates of electrophilic aromatic substitution?I. The experiment must be performed in dark conditions. II. Using the same solvents, a faster decolorization will be observed in aniline as compared to ethylbenzene. III. Chlorobenzene will react faster than methoxybenzene. IV. The use of AlCl3 in the halogenation of aromatic compounds using elemental bromine could hasten the reaction.For butenafine, develop a synthesis that starts with napthalene and benzene. (aromatic methyl groups can be converted to alkyl bromides using Br2/light, and aldehydes by heating the alkyl bromide in DMSO, eg. ArCH3 to ArCH2Br then to ArCHO).Organotin compounds play a significant role in diverse industrial applications. They have been used as plastic stabilizers and as pesticides or fungicides. One method used to prepare simple tetraalkylstannanes is the controlled direct reaction of liquid tin(IV) chloride with highly reactive trialkylaluminum compounds, such as liquid triethylaluminum (Al(C2H5)3). 3SnCl4 + 4AI(C2H5)3 →3Sn(C2H5)4 + 4AlCl3 In one experiment, 0.160 L of SnCl4 (d = 2.226 g/mL) was treated with 0.346 L of triethylaluminum (Al(C2H5)3): d = 0.835 g/mL). What is the theoretical yield in this experiment (mass of tetraethylstannane, Sn(C2H5)4)? If 0.257 L of tetraethylstannane (d= 1.187 g/mL) were actually isolated in this experiment, what was the percent yield?