Homework Answers
Enantiomers are non-superimposable mirror images of each other means they have opposite R,S designations at chiral carbons. Eg if a molecule have (R,S) configuration then its enantiomer will have (S,R) configuration.
Distereomers are the isomer of a compound which differ in configuration at one or more chiral center, but they can't be mirror images of each other. Eg if a compound has (R,S) configuration, its distereomers will have either (R,R) or (S,S) configuration.
Identical molecules always have same configuration.
Thus, enantiomeric pairs are : I) A with B, ( II) B with E , III) C with D
Distereomeric pairs : I) A with C. (II) A with D,. (III) B with C. (IV) B with D (V) E with C (VI) E with D
Identical : A with E
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1. Consider the following Fischer projection formulas of 3-amino-2-butanol. Decide which pairs of the formulas are...
need help with #2 Enantiomeric pairs: Diastereomeric pairs: Identical molecules: 2. For the structure given below,...
need help with #2
Enantiomeric pairs: Diastereomeric pairs: Identical molecules: 2. For the structure given below, the name of a specific stereoisomer is given. Show the stereochemistry of the named stereoisomer using a perspective (dash & wedge) structure, a staggered Newman projection and a Fischer projection. (3 pts) он о Y O H (2R,3R)-3-hydroxy-2-nitropentanoic acid NO 7 change ( 3. Decide whether each of the following pairs of structures represent enantiomers, diastereomers, or identical molecules (6 pts) ame one crates
For 2-chloro-3-hexanol: Draw the structure of all the possible stereoisomers with Fischer Projection and Perspective Formulas...
For 2-chloro-3-hexanol: Draw the structure of all the possible stereoisomers with Fischer Projection and Perspective Formulas showing both eclipsed and staggered conformations). 2) Assign the configuration of all chiral centers with R or S. (3) Give the complete IUPAC name for each stereoisomers. (4) Indicate the relationship among the structures, indicating which are the threo or erythro enantiomer, and diastereoisomer pairs.
rojection Formulas for each model in #16 (again orient the carbon chain up and down). Are...
rojection Formulas for each model in #16 (again orient the carbon chain up and down). Are the mirror images "superimposable?" Interchange any two of the groups located at one of the chiral centers on one of the models in # 1 6. What is the stereochemical relationship of the resulting structure with the one that used to be its mirror image? Will this 'new' model be "optically active?" Why or why not? 18. PART 4:2,3-DICHLOROPENTANE CH, CH(C)-CHC)-CH2CH Build a model...
I need some help to answer these following questions. Thanks. 41. Which molecule(s) is/are aromatic? I1...
I need some help to answer these following questions.
Thanks.
41. Which molecule(s) is/are aromatic? I1 IV (A) I only (C) I, III, and IV (B) I and IV (D) I, II, III, and IV OH OH 42. Which Fischer projection represents this structure? HO OH OH H CHO CHO (A) H-OH (B) HOH HOH CH2OH CH2OH CHO HOH CHO но -н CH2OH CH2OH 43. Which is a product of this ozonolysis reaction? 1.03 2. (CH3)2S H O I BHs/THF...
Please help with pre-lab questions. Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
PLEASE HELP WITH THESE. THANK YOU How are the following two compounds related? CH CH3 HO...
PLEASE HELP WITH THESE. THANK
YOU
How are the following two compounds related? CH CH3 HO -H HO -Н Given the following substitution reaction, what would the effect be of changing the solvent from CH3OH to (CH3)2S=0? H- OH H OH VS HO -H H -OH H -OH HO H + CH (CH2CH2-Br NaOH CH;(CH2), CH2-OH + NaBr CH OH CH2OH A. The reaction rate will increase. OB. There is no effect on the rate of the reaction, C. The...
1. Which of the following is an aldohexose? 2. Which of the following is a cetopentose? 3. Which of the following best d...
1.
Which of the following is an aldohexose?
2. Which of the following is a cetopentose?
3. Which of the following best describes the relationship
between D-glucose and D-fructose?
4. Which of the following is (are) L-alfohexose(s)?
5. Which of the following aldohexose(s) is (are)
dextrorotatory?
6. How many stereoisomers are possible for L-galactose? Draw
or look for its structure.
7. Which of the following conpounds is a pair of
enantiomers?
8. Draw the fisher projection for L-sedoheptulose and also...
Which of the following functional groups is not found in the D) molecule shown in Figure...
Which of the following functional groups is not found in the D) molecule shown in Figure 2? Он SH amide i) other iii) alkene iv) alkyne v) ester vi) thiol vii) i-vi are all present in the molecule R-0-2 NH Figure 2 E) Which of the following is not found in the molecule shown in Figure 3? но i) secondary alkyl halide i) primary alcohole ii primary carbon V quaternary carbon v) tertiary alkyl halide vi) tertiary alcohol vii)i-vi are...
26) Name the following compound. CH3 H2C=CH-CH2CHCH: A) 1,1-dimethyl-3-butane B) 4-methyl-1-pentene C) hexene D) 2-methyl-4-pentene E)...
26) Name the following compound. CH3 H2C=CH-CH2CHCH: A) 1,1-dimethyl-3-butane B) 4-methyl-1-pentene C) hexene D) 2-methyl-4-pentene E) 2-methylpentene 27) Name the following compound. CI A) 2,3,5-trichlorobenzene B) trichlorostyrene C) 1,3,4-trichlorobenzene D) 1,3,4-trichlorohexene E) 1,2,4-trichlorobenzene 28) Identify the formula for an alkene. A) CnH2n+4 B) CnH2n+2 C) CnH2n D) CnH2n-4 E) CnH2n-2 29) Name the following compound. A) 1,4-bromocyclohexene B) 1,4-dibromobenzene C) 3,6-dibromobenzene D) 2,5-dibromobenzene E) 2,5-dibromocyclohexene 30) Name the following compound. CECH CH,CH,CHCH A) 2-ethynebutane B) 3-methyl-1-pentyne C) 3-methyl-4-pentyne D) 3-ethyl-1-butyne...
need help with #2
Enantiomeric pairs: Diastereomeric pairs: Identical molecules: 2. For the structure given below, the name of a specific stereoisomer is given. Show the stereochemistry of the named stereoisomer using a perspective (dash & wedge) structure, a staggered Newman projection and a Fischer projection. (3 pts) он о Y O H (2R,3R)-3-hydroxy-2-nitropentanoic acid NO 7 change ( 3. Decide whether each of the following pairs of structures represent enantiomers, diastereomers, or identical molecules (6 pts) ame one crates
For 2-chloro-3-hexanol: Draw the structure of all the possible stereoisomers with Fischer Projection and Perspective Formulas showing both eclipsed and staggered conformations). 2) Assign the configuration of all chiral centers with R or S. (3) Give the complete IUPAC name for each stereoisomers. (4) Indicate the relationship among the structures, indicating which are the threo or erythro enantiomer, and diastereoisomer pairs.
rojection Formulas for each model in #16 (again orient the carbon chain up and down). Are the mirror images "superimposable?" Interchange any two of the groups located at one of the chiral centers on one of the models in # 1 6. What is the stereochemical relationship of the resulting structure with the one that used to be its mirror image? Will this 'new' model be "optically active?" Why or why not? 18. PART 4:2,3-DICHLOROPENTANE CH, CH(C)-CHC)-CH2CH Build a model...
I need some help to answer these following questions.
Thanks.
41. Which molecule(s) is/are aromatic? I1 IV (A) I only (C) I, III, and IV (B) I and IV (D) I, II, III, and IV OH OH 42. Which Fischer projection represents this structure? HO OH OH H CHO CHO (A) H-OH (B) HOH HOH CH2OH CH2OH CHO HOH CHO но -н CH2OH CH2OH 43. Which is a product of this ozonolysis reaction? 1.03 2. (CH3)2S H O I BHs/THF...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
PLEASE HELP WITH THESE. THANK
YOU
How are the following two compounds related? CH CH3 HO -H HO -Н Given the following substitution reaction, what would the effect be of changing the solvent from CH3OH to (CH3)2S=0? H- OH H OH VS HO -H H -OH H -OH HO H + CH (CH2CH2-Br NaOH CH;(CH2), CH2-OH + NaBr CH OH CH2OH A. The reaction rate will increase. OB. There is no effect on the rate of the reaction, C. The...
1.
Which of the following is an aldohexose?
2. Which of the following is a cetopentose?
3. Which of the following best describes the relationship
between D-glucose and D-fructose?
4. Which of the following is (are) L-alfohexose(s)?
5. Which of the following aldohexose(s) is (are)
dextrorotatory?
6. How many stereoisomers are possible for L-galactose? Draw
or look for its structure.
7. Which of the following conpounds is a pair of
enantiomers?
8. Draw the fisher projection for L-sedoheptulose and also...
Which of the following functional groups is not found in the D) molecule shown in Figure 2? Он SH amide i) other iii) alkene iv) alkyne v) ester vi) thiol vii) i-vi are all present in the molecule R-0-2 NH Figure 2 E) Which of the following is not found in the molecule shown in Figure 3? но i) secondary alkyl halide i) primary alcohole ii primary carbon V quaternary carbon v) tertiary alkyl halide vi) tertiary alcohol vii)i-vi are...
26) Name the following compound. CH3 H2C=CH-CH2CHCH: A) 1,1-dimethyl-3-butane B) 4-methyl-1-pentene C) hexene D) 2-methyl-4-pentene E) 2-methylpentene 27) Name the following compound. CI A) 2,3,5-trichlorobenzene B) trichlorostyrene C) 1,3,4-trichlorobenzene D) 1,3,4-trichlorohexene E) 1,2,4-trichlorobenzene 28) Identify the formula for an alkene. A) CnH2n+4 B) CnH2n+2 C) CnH2n D) CnH2n-4 E) CnH2n-2 29) Name the following compound. A) 1,4-bromocyclohexene B) 1,4-dibromobenzene C) 3,6-dibromobenzene D) 2,5-dibromobenzene E) 2,5-dibromocyclohexene 30) Name the following compound. CECH CH,CH,CHCH A) 2-ethynebutane B) 3-methyl-1-pentyne C) 3-methyl-4-pentyne D) 3-ethyl-1-butyne...
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