Determine absolute stereo configuration of (-)-3-methylhexane and write reasoning, if catalytic hydrogenation of (R)-(3)-methyl-1-hexene gives (+)-3-...
Determine absolute stereo configuration of (-)-3-methylhexane and write reasoning, if catalytic hydrogenation of (R)-(3)-methyl-1-hexene gives (+)-3- methylhexane.
Please draw the structures out and explain, thank you!
Homework Answers
See. By hdrogenation u get (+) isomer of 3- methylhexane.
As u have need the (-) isomer of the same compound. As we know
that (+) and (-) isomers are enantiomers to each other hence the
(-) -3-methylhexane structure is shown bwlow
Add Answer to:
Determine absolute stereo configuration of
(-)-3-methylhexane and write reasoning, if
catalytic hydrogenation of (R)-(3)-methyl-1-hexene
gives (+)-3-...
Q2B Compound 7 is reduced stereo-selectively via a Noyori asymmetric hydrogenation reaction. Reagents Reagents (R)-8 1)...
Q2B Compound 7 is reduced stereo-selectively via a Noyori asymmetric hydrogenation reaction. Reagents Reagents (R)-8 1) Taking the stereochemistry into account, suggest appropriate reagents (reagents 2) for this transformation (hint: analyse the absolute configuration of product (R)-8 absolute configuration). 2 marks 2) Using the mnemonic model for this transformation, show the stereodetermining step in this catalysis. Briefly explain your reasoning. 4 marks 3) Using the mnemonic model for this transformation, show why compound (S)-8 is not formed. Briefly explain your...
D Assign the absolute configuration (RS) of the chiral molecules (write your answers onto the dot...
Hi, please solve all of these. Thank you
D Assign the absolute configuration (RS) of the chiral molecules (write your answers onto the dotted lines) (8 Pts) 2) Draw the zig-zag bond-line structures of the following molecules (Draw all bonds except C-H bond. Do not use C, ao lahel the carbons. Respect bond angles. Use dash-wedge bonds only for the chrality cent (13 Pts) (a) S2-aminopentane (b) BR)-23-dimethylpentane (c) R, 3S)-1-chloro-3-methy cyclohex ane flat representanon; do not draw chair confonmation...
1. Draw the structures of the following compounds: a. 3-ethyl-4-methyl-2-hexene b.2-chloro-butyl acetate c. Ethylbenzene d. 2-methyl-3-pentanol...
1. Draw the structures of the following compounds: a. 3-ethyl-4-methyl-2-hexene b.2-chloro-butyl acetate c. Ethylbenzene d. 2-methyl-3-pentanol e. 2-methylpropyl methyl ether 2. A) Distinguish between photodissociation and photoionization B) Use energy requirements of these two processes to explain why photodissociation of oxygen is more important than photoionization of oxygen at altitudes below about 90 km.
Please Answer these Organic Chemistry questions. Thank you. ド 3. a. Draw the 3D structures of...
Please Answer these Organic Chemistry questions.
Thank you.
ド 3. a. Draw the 3D structures of the stero isomers of 2-bromo-3-chlorobutane. Mention their configuration and the relation between them. b. As a but for 1,2-diethylcyclopentane. 4. a. React 1-butanol with HBr, and 2-methyl-2-butanol with HCI. Write the R.D.S step in the mechanism of each reaction. b. Draw the products of S reaction of (S)-2-butanol with HCl using TsCl. Similarly CH,OK with (R)-3-bromo-3-methylhexane Do 5. a. Write the products and mechanism...
Determine the enantiomeric excess (1) and indicate which configuration (2), S or R, is in excess....
Determine the enantiomeric excess (1) and indicate which configuration (2), S or R, is in excess. If R-3-bromo-2- methylhexane is -80 degrees, would a polarimetry reading of the mixture in this problem rotate light (3) clockwise (CW) or counterclockwise (CC) (8) Br Br 15% 85% (this question is worth 9 points, not 8 as stated in the picture) 1. determine enantiomeric excess (your answer should be a number) 2. determine whether excess is S or R. 3. Does the mixture...
7. Consider the four possible types of carbonium ions: 3, , 1°, and methyl. Arr them...
7. Consider the four possible types of carbonium ions: 3, , 1°, and methyl. Arr them in order of increasing stability (using generic structures, ie. R groups explain your reasoning (10 pts) ures, ie. R groups, etc.) and our possible types of carbenium ions: 3, 20, 1, and methyl. Arrange creasing stability (using generic structures, ie. R groups, etc.) and them in order of in explain your reasoning (10 pts). The mesylate, tosylate, and triflate are all good leaving groups....
1. a) Draw the structure of 3-hexene, circling all allylic hydrogens. b) Draw the structure of...
1. a) Draw the structure of 3-hexene, circling all allylic hydrogens. b) Draw the structure of 3-hexene again, this time circling all vinylic hydrogens. 2. a) Draw the structure of chlorofornm b) What do you imagine the structure of bromoform might be? 3. Show the steps necessary to convert propyne into cis 6-methyl-2-heptene. 4. Write in the product(s). Include stereochemistry where relevant. Label major and minor products CH3 CH3 a) CH3 NBS CH3 hu b) NaCECH (R) CH3CH2CH2CHDBr (D -...
4. Absolute Configuration and R/S Sequence Rules. In 3 you constructed models with two stereocenters that...
4. Absolute Configuration and R/S Sequence Rules. In 3 you constructed models with two stereocenters that represented 4 stereoisomers. 2,3-Dibromobutanoic acid exemplifies such a compound, Make models for the isomers of this compound. a. Draw solid/dashed-wedge structures for the 4 possible stereoisomers and label the enantiomers and diastereomers. b. Specify the sequence priority for the substituents on carbon-2 and carbon-3. Label each structure with the proper R/S notation in the drawings above, for example (2R, 35). d. Draw Newman projections...
Question: What reagents are used in the following: 1) Reduction of methyl pent-3-enoate to pentan-1-ol (two...
Question: What reagents are used in the following: 1) Reduction of methyl pent-3-enoate to pentan-1-ol (two steps) 2) Oxidation of 3-methylbut-1-ene to 3-methyl-2-oxobutanoic acid (two steps) 3) Oxidation of 2-bromobutane to butyraldehyde (three steps) I was able to draw these out with the steps but cannot decide which reagents are applicable, especially for the breakdown of double bonds. Please help! Thank you!
Can someone tell me if these structures are correct? can you please write the correct structures...
Can
someone tell me if these structures are correct? can you please
write the correct structures as well. i am also have a bit of
trouble with questions 4-6. please help thank you.
3- Draw the structural formulas for the following compounds: a))2,2,5,5-tetramethylheptane C H3 b) 6,6,6-trichloro-1-hexyne ) 3-chloropropanal Cy Hi CO d) trans-2.2,5,5-tetramethyl-3-hexene CH c l e) 3-methyltoluene 3-bromo-5-methylphenol CaH2rO F10 F9 4- Complete the following reactions a) b) Br c) [Ol HaC он HO CH3 5- A student...
Q2B Compound 7 is reduced stereo-selectively via a Noyori asymmetric hydrogenation reaction. Reagents Reagents (R)-8 1) Taking the stereochemistry into account, suggest appropriate reagents (reagents 2) for this transformation (hint: analyse the absolute configuration of product (R)-8 absolute configuration). 2 marks 2) Using the mnemonic model for this transformation, show the stereodetermining step in this catalysis. Briefly explain your reasoning. 4 marks 3) Using the mnemonic model for this transformation, show why compound (S)-8 is not formed. Briefly explain your...
Hi, please solve all of these. Thank you
D Assign the absolute configuration (RS) of the chiral molecules (write your answers onto the dotted lines) (8 Pts) 2) Draw the zig-zag bond-line structures of the following molecules (Draw all bonds except C-H bond. Do not use C, ao lahel the carbons. Respect bond angles. Use dash-wedge bonds only for the chrality cent (13 Pts) (a) S2-aminopentane (b) BR)-23-dimethylpentane (c) R, 3S)-1-chloro-3-methy cyclohex ane flat representanon; do not draw chair confonmation...
1. Draw the structures of the following compounds: a. 3-ethyl-4-methyl-2-hexene b.2-chloro-butyl acetate c. Ethylbenzene d. 2-methyl-3-pentanol e. 2-methylpropyl methyl ether 2. A) Distinguish between photodissociation and photoionization B) Use energy requirements of these two processes to explain why photodissociation of oxygen is more important than photoionization of oxygen at altitudes below about 90 km.
Please Answer these Organic Chemistry questions.
Thank you.
ド 3. a. Draw the 3D structures of the stero isomers of 2-bromo-3-chlorobutane. Mention their configuration and the relation between them. b. As a but for 1,2-diethylcyclopentane. 4. a. React 1-butanol with HBr, and 2-methyl-2-butanol with HCI. Write the R.D.S step in the mechanism of each reaction. b. Draw the products of S reaction of (S)-2-butanol with HCl using TsCl. Similarly CH,OK with (R)-3-bromo-3-methylhexane Do 5. a. Write the products and mechanism...
Determine the enantiomeric excess (1) and indicate which configuration (2), S or R, is in excess. If R-3-bromo-2- methylhexane is -80 degrees, would a polarimetry reading of the mixture in this problem rotate light (3) clockwise (CW) or counterclockwise (CC) (8) Br Br 15% 85% (this question is worth 9 points, not 8 as stated in the picture) 1. determine enantiomeric excess (your answer should be a number) 2. determine whether excess is S or R. 3. Does the mixture...
7. Consider the four possible types of carbonium ions: 3, , 1°, and methyl. Arr them in order of increasing stability (using generic structures, ie. R groups explain your reasoning (10 pts) ures, ie. R groups, etc.) and our possible types of carbenium ions: 3, 20, 1, and methyl. Arrange creasing stability (using generic structures, ie. R groups, etc.) and them in order of in explain your reasoning (10 pts). The mesylate, tosylate, and triflate are all good leaving groups....
1. a) Draw the structure of 3-hexene, circling all allylic hydrogens. b) Draw the structure of 3-hexene again, this time circling all vinylic hydrogens. 2. a) Draw the structure of chlorofornm b) What do you imagine the structure of bromoform might be? 3. Show the steps necessary to convert propyne into cis 6-methyl-2-heptene. 4. Write in the product(s). Include stereochemistry where relevant. Label major and minor products CH3 CH3 a) CH3 NBS CH3 hu b) NaCECH (R) CH3CH2CH2CHDBr (D -...
4. Absolute Configuration and R/S Sequence Rules. In 3 you constructed models with two stereocenters that represented 4 stereoisomers. 2,3-Dibromobutanoic acid exemplifies such a compound, Make models for the isomers of this compound. a. Draw solid/dashed-wedge structures for the 4 possible stereoisomers and label the enantiomers and diastereomers. b. Specify the sequence priority for the substituents on carbon-2 and carbon-3. Label each structure with the proper R/S notation in the drawings above, for example (2R, 35). d. Draw Newman projections...
Can
someone tell me if these structures are correct? can you please
write the correct structures as well. i am also have a bit of
trouble with questions 4-6. please help thank you.
3- Draw the structural formulas for the following compounds: a))2,2,5,5-tetramethylheptane C H3 b) 6,6,6-trichloro-1-hexyne ) 3-chloropropanal Cy Hi CO d) trans-2.2,5,5-tetramethyl-3-hexene CH c l e) 3-methyltoluene 3-bromo-5-methylphenol CaH2rO F10 F9 4- Complete the following reactions a) b) Br c) [Ol HaC он HO CH3 5- A student...
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