2,4-dimethylhexane looking through C3-C4 bond and perform a full conformation alanalysis by rotating along the C2-C3 bond. Make sure to clearly identify the structure of all minima (on the xaxis) and their relative Energies (on they axis).
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Draw the Newman projection of 3-ethyl-2,4-dimethylhexane looking through C3-C4 bond and perform a full conformation alanalysis by rotating along the C2-C3 bond. Make sure to clearly identify the structure of all minima (on the xaxis) and their relative Energies (on they axis).
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- Draw the structure of the following three isomeric esters with chemical formula C-H1,0,. Ester #1: (E)-ethyl 2-pentenoate Ester #2: ethyl 3-methyl-3-butenoate Ester #3: (Z)-methyl 3-hexenoate • Consider E/Z stereochemistry of alkenes. • 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. opy aste ChemDoodle Previous Next Email Instructor Save and ExitDraw the structures for (Z)-3-methylhex-3-ene and the two major organic products for its reaction with HBr. Be sure to show all stereoisomers using wedge and dash stereochemistry at any chirality center.Write Newman projections for all three staggered conformations of (R)-2-bromobutane, viewing down the C2-C3 bond. Upon treatment with strong base (e.g., NAOH), three alkene isomers can form. Illustrate which of the above conformations would be expected to lead to two of these isomers, each with a double bond between C2 and C3. Predict which will be the major product and explain why.
- Which of these products is the result of a hydride shift occuring during the substitution reaction of aqueous 2-chloro-3-methylpentane? CH3CH2CCH2CH3 || CH2 CH3CH(OH)CH(CH3)CH2CH3 CH2=CHC(CH3)=CHCH3 CH3CH=C(CH3)CH2CH3 CH3CH2C(CH3)CH2CH3 | OHDraw the skeletal (line-bond) structure of trans-1-methoxy-2-methylcyclohexane. Use a dash or wedge bond to indicate relative orientation of substituents on ring where applicable. Draw the skeletal (line-bond) structure of (S)-1-ethoxy-2-methylhexane. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable. Draw the two starting materials that could be used to make the product via a Williamson ether synthesis.Provide the systematic name for each of the following isomeric esters with the chemical formula C₂H1202. (Be sure to indicate double bond stereochemistry using (E)/(Z) notation. Indicate stereochemistry in rings with the terms cis or trans. It is not necessary to use italics in writing compound names.) ball & stick ✓- + labels (E)-methyl 3-methylpent-3-enoate An error has been detected in your answer. Check for typos, miscalculations etc. before submitting your answer. ball & stick + labels isopropyl-2-methylacrylate ball & stick - + labels (E)-ethyl pent-2-enoate 12
- Part 5a. Rotamers. Answers the following questions about the C-C bond indicated below 3 4 3-methylhexane H/H eclipsed CH3/H eclipsed CH3CH₂/H eclipsed CH3/CH3 eclipsed CH3/CH₂CH3 eclipsed CH₂CH3/CH₂CH3 eclipsed CH3/CH3 gauche CH3CH₂CH3 gauche CH₂CH3/CH₂CH3 gauche 1.0 kcal/mol 1.5 kcal/mol 1.6 kcal/mol 2.5 kcal/mol 3.0 kcal/mol 5.1 kcal/mol 0.9 kcal/mol unknown 1.6 kcal/mol (a) Draw the most stable rotamer, using a newman projection, for the C3-C4 bond of 3- methylhexane. (b) Draw the least stable rotamer, using a newman projection, for the C3-C4 bond of 3-methyl hexane. (c) The barrier to rotation for the C3-C4 bond of 3-methylhexane is 6.3 kcal/mol. Given this information, and the information provided above, what is the energy cost for a CH3 / CH₂CH3 gauche interaction? (show your work)Alcohols can be converted to alkyl chlorides using SOCl2 with complete inversion of stereochemistry. Using curved arrows draw the stepwise mechanism for chlorination of an alcohol. Be sure to include lone pairs necessary to the mechanism steps and any non-zero formal charges.B) The energy diagram shows the relative energies of the conformations of 2,2,3- trimethylpentane produced during the rotation about the C3-C4 bond. Draw the conformations corresponding to points 1-6 in the curve. Reference groups are t- butyl group and methyl group. P.T.O. o are willing to appear for (even) End Semester e-examinations (september 2021) are r Ener gy 60 120 180 240 300 360 Rotation about C3-C4 bond
- > acetone > ethane - Two molecular ions H3C-CH₂-CH₂-COR and have undergone McLafferty rearrangement and Ortho effect respectively. What are the possible fragments obtained as a result of these processes ? COOCH3 OH + -COH]: [CH₂O and Co] CO (A) (B) x] : [GH₂C (C) RH, C₂H₂ and CH₂CO: [(CH₂O), CO and CH₂OH] (D) H₂CCROH and C₂H4; [(CH₂O), CO and CH₂OH] R-CH₂-CH₂ - CH₂ - COH H₂C=CR = CROH and H₂C = CH₂ C₂H403 and CH4 P.T.O.Draw the structure of the following three isomeric esters with chemical formula C-H1,02. Ester #1: methyl cyclopentanecarboxylate Ester #2: propyl cyclopropanecarboxylate Ester #3: ethyl cyclobutanecarboxylate • Consider E/Z stereochemistry of alkenes. • 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 skeletal (line - bond) structure of (S) - 2, 2, 3trimethylhexane, Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable. 12. Draw a skeletal (line - bond) structure of (S) - 4 - ethyloctane. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable. 13. Draw the enantiomer of the molecule shown below. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable.