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b. Which of the following alkanes has the highest bolling point? 2,3-dimethylbutane: 2-methylpentane; 3-methylpentane; hexane c....
4 4. (a) Draw the structure of the two chair forms of methylcyclohexane. Draw in all...
4 4. (a) Draw the structure of the two chair forms of methylcyclohexane. Draw in all bonds (even the C-H bonds). Be sure the axial and equatorial bonds are shown correctly. On the appropriate structure, indicate the 1,3-diaxial interactions involving the methyl group. (b) Which is more stable, trans-1,3-dimethylcyclohexane or cis-1,3-dimethylcyclohexane? Why? 5. Draw the Newman projections for the anti conformation and two types of eclipsed conformations of 1,2-diiodoethane. Of the two eclipsed conformations, which is of higher energy, and...
34 Which of the following is the highest energy conformer of 2,3-dimethylbutane HCH, I M V...
34 Which of the following is the highest energy conformer of 2,3-dimethylbutane HCH, I M V Ho CH ) Ho Ho O Ho HC not A) 1 B) II C) III D) IV 35) - 35) Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? " DIV" C) III B) II 36) Which of the following is the most stable conformation of cis-1-ethyl-3-isopropyleyclohexane? A) B) II 37) Select the most stable conformer of cis-1,3-cyclohexanediol HO dis-1,3-cyclohexanediol но Тон OH OH HO...
Define and provide examples of the following terms: a) n-alkanes b) alkene c) alkyne d) saturated...
Define and provide examples of the following terms: a) n-alkanes b) alkene c) alkyne d) saturated e) hydrophobic f) aromatic g) hydrophilic h) combustion i) methylene group j) methyl group k) common name l) IUPAC name m) conformations n) Newman projection o) eclipsed p) staggered q) gauche conformation r) anti conformation s) catalytic cracking t) cis-trans isomers of a ring u) chair conformation v) boat conformation w) distorted boat x) half chair conformation y) axial position z) equatorial position aa)...
Chem 241 Chapter 3 -Class Praetice 2 Draw the 2 chair conformations of the following, label...
Chem 241 Chapter 3 -Class Praetice 2 Draw the 2 chair conformations of the following, label the substituents as axial or equatorial Determine which conformation between the 2 is more stable. cis-1-ethyl-3-isopropylcyclohexane trans-1-isopropyl-2-methyleyclohexane trans-1-methyl-2-isopropylcyclohexane cis-1-ethyl-4-methylcyclohexane Among the following, which respresent the same compound? Which represent different compounds? CH3 H3C HyC CHs H. CH3
Question 1.) Which of the following describes the most stable conformation of trans-1-tert-butyl-3-methylcyclohexane? a.) Both groups...
Question 1.) Which of the following describes the most stable conformation of trans-1-tert-butyl-3-methylcyclohexane? a.) Both groups are equatorial. b.) Both groups are axial. c.) none of these d.) The tert-butyl group is axial and the methyl group is equatorial. e.) The tert-butyl group is equatorial. Question 2.) Alkanes with one to four carbons exists as gases at room temperature. a.) True b.) False Question 3.) How many monochlorination products would be obtained from the chlorination of pentane a.) 1 b.)...
Which compound can exist with two equatorial methyl groups? a) cis-1, 3-dimethylcyclohexane b) trans-1, 2-dimethylcyclohexane c)...
Which compound can exist with two equatorial methyl groups? a) cis-1, 3-dimethylcyclohexane b) trans-1, 2-dimethylcyclohexane c) both a and b are true d) neither a nor b are true
meoel goups are present in this molecle? a) carboxylic acid, amine, arene b) amide, arene c)...
meoel goups are present in this molecle? a) carboxylic acid, amine, arene b) amide, arene c) alcohol, ketone, aminene d) alcohol, ketone, amide, alkene 31 What is the correct IUPAC name for this compound b) 5-butyl-2.7-dimethylocatne a) 5-butyl-2,7-dimethylocatne c) 2-methyl-5-(2-methylpropylnonane d) 5-butyl-2-methylnonane Which of he folowing represe rosation o the 2-3 bond of butane? nts the highest energy eclipsed Hs Hs (b) H c) (d) H What is the correct order of strain energy (from lowest to highest)? 33. CH3...
Lucy propere (d) isopentane and 2-methylbutane 3. Which one of the following hexanes has the lowest...
Lucy propere (d) isopentane and 2-methylbutane 3. Which one of the following hexanes has the lowest boiling point? (a) 3-methylpentane (b) 2-methylpentane (c) hexane (d) 2,2-dimethylbutane 4. A CH3 In the lowest energy conformation of the compound to the right, how many alkyl substituents are axial? (a) 0 (c) 2 (b) 1 (d) 3 (CH),CHWV CH.CH 5. Identify the correct IUPAC name for the structure shown below. (a) 1-tert-butyl-2-chloro-5-bromocyclooctane (b) 5-bromo-1-tert-butyl-2-chlorocyclooctane (c) 1-bromo-4-chloro-5-tert-butylcyclooctane (d) 1-bromo-4-tert-butyl-5-chlorocyclooctane (e) 1-tert-butyl-4-bromo-7-chlorocyclooctane 6. Which of...
3. Cyclic compounds The presence of the ring in all but very large ring cyclic molecules...
3. Cyclic compounds The presence of the ring in all but very large ring cyclic molecules prevents full rotation of the ring atoms. For this reason, stereoisomerism may also occur in cyclic molecules. a) Prepare a model of cyclohexane, C6H12. Draw the condensed formula. b) Build a model of methylcyclohexane (C7H14) by replacing one of the hydrogens of cyclohexane with a methyl group. Draw the skeletal formula for methylcyclohexane. 2 c) How many different isomers exist for methylcyclohexane (CyH34)? d)...
6. Provide the IUPAC names for the compounds below Name: 7. Draw the following: cis-1-isobutyl-2-propyleyclopentane 8....
6. Provide the IUPAC names for the compounds below Name: 7. Draw the following: cis-1-isobutyl-2-propyleyclopentane 8. Label the indicated atoms in the structure below as 1º, 2º, 3º, or 4º. PB A A B co 9. Draw Newman projections for the day-diethylane about the C4CS bond, Circle the most stable conforme if you need additional space, please feel free to the backside of this paper 10. Draw the chair conformation and ring-flip for the given compound. Calculate the sterie strain...
4 4. (a) Draw the structure of the two chair forms of methylcyclohexane. Draw in all bonds (even the C-H bonds). Be sure the axial and equatorial bonds are shown correctly. On the appropriate structure, indicate the 1,3-diaxial interactions involving the methyl group. (b) Which is more stable, trans-1,3-dimethylcyclohexane or cis-1,3-dimethylcyclohexane? Why? 5. Draw the Newman projections for the anti conformation and two types of eclipsed conformations of 1,2-diiodoethane. Of the two eclipsed conformations, which is of higher energy, and...
34 Which of the following is the highest energy conformer of 2,3-dimethylbutane HCH, I M V Ho CH ) Ho Ho O Ho HC not A) 1 B) II C) III D) IV 35) - 35) Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? " DIV" C) III B) II 36) Which of the following is the most stable conformation of cis-1-ethyl-3-isopropyleyclohexane? A) B) II 37) Select the most stable conformer of cis-1,3-cyclohexanediol HO dis-1,3-cyclohexanediol но Тон OH OH HO...
Chem 241 Chapter 3 -Class Praetice 2 Draw the 2 chair conformations of the following, label the substituents as axial or equatorial Determine which conformation between the 2 is more stable. cis-1-ethyl-3-isopropylcyclohexane trans-1-isopropyl-2-methyleyclohexane trans-1-methyl-2-isopropylcyclohexane cis-1-ethyl-4-methylcyclohexane Among the following, which respresent the same compound? Which represent different compounds? CH3 H3C HyC CHs H. CH3
Which compound can exist with two equatorial methyl groups? a) cis-1, 3-dimethylcyclohexane b) trans-1, 2-dimethylcyclohexane c) both a and b are true d) neither a nor b are true
meoel goups are present in this molecle? a) carboxylic acid, amine, arene b) amide, arene c) alcohol, ketone, aminene d) alcohol, ketone, amide, alkene 31 What is the correct IUPAC name for this compound b) 5-butyl-2.7-dimethylocatne a) 5-butyl-2,7-dimethylocatne c) 2-methyl-5-(2-methylpropylnonane d) 5-butyl-2-methylnonane Which of he folowing represe rosation o the 2-3 bond of butane? nts the highest energy eclipsed Hs Hs (b) H c) (d) H What is the correct order of strain energy (from lowest to highest)? 33. CH3...
Lucy propere (d) isopentane and 2-methylbutane 3. Which one of the following hexanes has the lowest boiling point? (a) 3-methylpentane (b) 2-methylpentane (c) hexane (d) 2,2-dimethylbutane 4. A CH3 In the lowest energy conformation of the compound to the right, how many alkyl substituents are axial? (a) 0 (c) 2 (b) 1 (d) 3 (CH),CHWV CH.CH 5. Identify the correct IUPAC name for the structure shown below. (a) 1-tert-butyl-2-chloro-5-bromocyclooctane (b) 5-bromo-1-tert-butyl-2-chlorocyclooctane (c) 1-bromo-4-chloro-5-tert-butylcyclooctane (d) 1-bromo-4-tert-butyl-5-chlorocyclooctane (e) 1-tert-butyl-4-bromo-7-chlorocyclooctane 6. Which of...
3. Cyclic compounds The presence of the ring in all but very large ring cyclic molecules prevents full rotation of the ring atoms. For this reason, stereoisomerism may also occur in cyclic molecules. a) Prepare a model of cyclohexane, C6H12. Draw the condensed formula. b) Build a model of methylcyclohexane (C7H14) by replacing one of the hydrogens of cyclohexane with a methyl group. Draw the skeletal formula for methylcyclohexane. 2 c) How many different isomers exist for methylcyclohexane (CyH34)? d)...
6. Provide the IUPAC names for the compounds below Name: 7. Draw the following: cis-1-isobutyl-2-propyleyclopentane 8. Label the indicated atoms in the structure below as 1º, 2º, 3º, or 4º. PB A A B co 9. Draw Newman projections for the day-diethylane about the C4CS bond, Circle the most stable conforme if you need additional space, please feel free to the backside of this paper 10. Draw the chair conformation and ring-flip for the given compound. Calculate the sterie strain...
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