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- what type of mechanisims is needed for this?1) Li/ pentane A CH,CH,- B CH,1 2) Cul Write condensed formulas for the structure of the Gilman's reagent Aand its coupling product B from the above reaction in the two boxes shown below: Enter your answers in the box like this: A- condensed formula. B condensed formula. Do not use a dash (-) to indicate a covalent bond between two elements, Ex: type CC not C-C1. Draw the structure of (4S)-1-bromo-4-methylhexane a. Draw the substitution product that would form upon reaction with NaOCH3 in DMSO solvent. (Include stereochemistry) b. Would this reaction be SN1 or Sn2? C. Draw a detailed step-wise mechanism for this substitution reaction. Be sure to include all steps, formal charges, and show the movement of electrons with curved arrows. Draw in any lone pairs of electrons that are directly involved in the reaction. or distributed d. Draw the elimination product that would form upon reaction of (4S)-1-bromo-4- methylhexane with KOC(CH3)3 in HOC(CH3)3 solvent. (Include tereochemistry) e. Would this reaction be E1 or E2? f. y not be shar Draw a detailed step-wise mechanism for this elimination reaction. Be sure to include all steps, formal charges, and show the movement of electrons with curved arrows. Draw in any lone pairs of electrons that are directly involved in the reaction.
- a) Free radical bromination is more selective than free radical chlorination. Draw a reaction coordinate diagram for the specific step in the radical chain mechanism that illustrates the source of this selectivity, and explain your reasoning. b) Explain why the bond dissociate energy (BDE) of tert-butane is 95 kcal/mol while the BDE for propane is 99 kcal/mol.2. For the reaction scheme below: (i) Suggest a reagent X that could be used to accomplish the first step. (ii) Draw the curly arrow mechanism for the second step in the scheme. Na o HO,Draw structural formulas for an aldehyde or ketone and alkyl (or aryl) bromide that could be used in a Grignard synthesis of the alcohol shown. ● OH You do not have to consider stereochemistry. . . If there is more than one combination, draw only one. ● CH3 Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate structures with + signs from the drop-down menu.
- Draw a structural formula for the more stable carbocation intermediate formed in the reaction shown. o • You do not have to consider stereochemistry. . Do not include anionic counter-ions, e.g., I, in your answer. • For cases in which carbocations of the same or similar stability are expected, draw all of the structures. =CH₂ + HBr • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottor right corner. Separate structures with + signs from the drop-down menu. ● **ll + O T $ » [ ]#NH H3C. H. H,NNH2 NH H3C „NH2 ČH3 H3C One of the reactions used in determining the sequence of nucleotides in a strand of DNA is reaction with hydrazine. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism. Arrow-pushing Instructions :0: H3C H3C. NH NH H2N NH2 'N" H2N-N H2 N. ČH36. Both acid-catalyzed hydration and oxymercuration-demercuration are addition reactions that add a hydroxyl group (--OH) and a hydrogen atom across a t-bond to make a Markovnikov product. Because of this, both reactions can often end with the same major organic product. 3 Explain in 1-3 complete sentences why substrate A leads to the same product no matter the conditions and why substrate B leads to two different products based on reaction conditions. 4 10 A ER A % H₂SO4 H₂O 1. Hg(OAc)2 2. NaBH4 當 5 OH Q Search T (racemic) OH (racemic) 6 & B B H₂SO4 H₂O 1. Hg(OAc)₂ 2. NaBH4 OH (racemic) lyi O
- Write TRUE if the statement is correct and FALSE if the statement is wrong. Please answer them all Substitution reactions do not occur in aromatic rings because of pi-electron delocalization. The resulting iodinated aspirin has a higher Rf compared to aspirin after visualizing with ferric chloride. The mobile phase used in determining the Rf of the iodinated aspirin is 5% ethyl acetate in acetic acid. When isopropyl alcohol reacts with HCI, the resulting product is 2-chloropropane. In Fehling's test, the theoretical product after an aldehyde is mixed with Fehling's Solution is alcohol. lodoform, which has a molecular formula of CH3l, is indicative that a ketomethyl group is present. Based on the physical property, hydroquinone has a lower boiling point compared to catechol. Picric acid, being a phenolic compound, tests positive for the FeCl3 test. Nucleophilic molecules are electron-rich molecules that can "attack" electron-deficient molecules. When FeCl3 is used in visualizing…Draw structural formulas for an aldehyde or ketone and alkyl (or aryl) bromide that could be used in a Grignard synthesis of the alcohol shown. O OH • You do not have to consider stereochemistry. . If there is more than one combination, draw only one. + ▾ CH3 • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate structures with + signs from the drop-down menu. 8-8 = ChemDoodleⓇ Q Sn [F taWhy should you keep your head out of the fume hood during the reaction between tetraphylcyclopentadienone and Dimethyl acetylenedicarboxylate? Because the addition of heat to this experiment increases the pressure within the reaction vessel, the apparatus could explode unexpectedly. O Due to the formation of carbon monoxide gas, which is toxic if inhaled. Due to the formation of carbon monoxide, carbon dioxide, and ethylene gas, which are all toxic when inhaled. O All of the above