New York University BIOCHEMIST 406 1)A student named a particular compound 2-ethyl-3-methyl-2-butene

Name: New York University BIOCHEMIST 406 1)A student named a particular compound 2-ethyl-3-methyl-2-butene. Assuming that the
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New York University

BIOCHEMIST 406

1)A student named a particular compound 2-ethyl-3-methyl-2-butene. Assuming that the student's choice actually corresponded to the correct distribution of the double bond and the substituents, what is the correct IUPAC name for this compound?

1. 2-ethyl-3-methyl-2-butene
2. 3,4-dimethyl-3-pentene
3. 2,3-dimethyl-2-pentene
4. 2,3-dimethyl-1-pentene

A student wanted to use the branched groups, isobutyl, sec-butyl, and tert-butyl when naming alkenes, but was told not to. What is the correct IUPAC name for the compound the student called isobutylethene?
1. 4-methyl-1-pentene
2. 3-methyl-1-pentene
3. 3,3-dimethyl-1-butene
4. none of these

A student wanted to use the branched groups, isobutyl, sec-butyl, and tert-butyl when naming alkenes, but was told not to. What is the correct IUPAC name for the compound the student called sec-butylethene?
1. 4-methyl-1-pentene
2. 3-methyl-1-pentene
3. 3,3-dimethyl-1-butene
4. none of these

What is the correct IUPAC name for the following compound

?

1. 2-methyl-3-propyl-2-butene
2. 1,1,2-trimethyl-1-pentene
3. 2,3-dimethyl-2-hexene
4. none of these

What is the name of the lightest hydrocarbon which has cis and trans isomers?
1. 1-butene
2. 2-butene
3. 1,2-dimethylcyclopropane
4. Propene

Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C₃H₅Br?
1. 1-bromopropene
2. 2-bromopropene
3. 3-bromopropene
4. none of these

Cis-trans isomers do not exist for which of the following compounds, all of which have the molecular formula C₃H₄Br₂?
1. 1,1-dibromopropene
2. 1,2-dibromopropene
3. 1,3-dibromopropene
4. they do not exist for any of these three molecules

Which of the following, all of which have the molecular formula C₅H₁₀, has cis and trans isomers?
1. 2-methyl-1-butene
2. 2-methyl-2-butene
3. 2-pentene
4. none of them

Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula C₅H₁₀?
1. 1-pentene
2. 2-methyl-1-butene
3. 2-methyl-2-butene
4. 1,2-dimethylcyclopropane

Which of the following structures corresponds to cis-3-methyl-2-hexene A.

B.

C.

D.

Which of the following compounds, all of which have the molecular formula C₆H₁₂, has cis and trans

isomers?

1. 2-methyl-1-pentene
2. 2-methyl-2-pentene
3. 3-methyl-2-pentene
4. they all have cis-trans isomers

Which of the following compounds, all of which have the molecular formula C₆H₁₂, does not have cis and

trans isomers?

1. 4-methyl-2-pentene
2. 2-methyl-1-pentene
3. 3-methyl-2-pentene
4. none of them, they all have cis-trans isomers

What is the correct IUPAC name for the following compound: ?
1. trans-3-propyl-3-hexene
2. cis-3-propyl-3-hexene
3. trans-4-ethyl-3-heptene
4. cis-4-ethyl-3-heptene

What is the configuration of each of the alkenes shown below?

1. (i) cis (ii) cis
2. (i) trans (ii) trans
3. (i) cis (ii) trans
4. (i) trans (ii) cis

Stereoisomers exist for which of the following molecules, all of which have the molecular formula C₅H₈?
1. 1,3-pentadiene
2. 1,4-pentadiene
3. 2-methyl-1,3-butadiene
4. all of them

Including cis-trans isomers, how many different alkenes have the molecular formula C₄H₈?
1. 2
2. 3
3. 4
4. 5

Including cis-trans isomers, how many different alkenes have the molecular formula C₅H₁₀?
1. 4
2. 5
3. 6
4. 7

How many cycloalkenes have the molecular formula C₄H₆?
1. 1
2. 2
3. 3
4. 4

How many cycloalkenes have the molecular formula C₅H₈?
1. 7
2. 8
3. 9
4. 10

Which of the following is not a correct IUPAC name?
1. 3-methylcyclopentene
2. 4-methylcyclopentene
3. 5-methylcyclopentene
4. none, they are all correct

Which of the following is a correct IUPAC name?
1. 4-ethyl-1-methylcyclohexene
2. 5-ethyl-2-methylcyclohexene
3. 1-methyl-4-ethylcyclohexene
4. 5-methyl-2-ethylcyclohexene

Which of the following is not a correct IUPAC name?
1. cis-2,3-dimethylcyclopentene
2. cis-3,4-dimethylcyclopentene
3. cis-3,5-dimethylcyclopentene
4. none, they are all correct

Cis-trans isomers exist for which of the following?
1. 1,2-dimethylcyclopentene
2. 2,3-dimethylcyclopentene
3. 3,5-dimethylcyclopentene
4. all of them

How many stereoisomers are possible for 1,4-heptadiene?
1. 2
2. 4
3. 7
4. 8

How many stereoisomers are possible for 2,4-heptadiene?
1. 2
2. 4
3. 7
4. 8

How many stereoisomers are possible for 1,4,7-octatriene?
1. 2
2. 4
3. 8
4. 16

How many stereoisomers are possible for 1,4,6-octatriene?
1. 2
2. 4
3. 8
4. 16

How many stereoisomers are possible for 2,4,6-nonatriene?
1. 2
2. 4
3. 8
4. 16

Which of the following is true of the non-cyclic portion of vitamin A?
1. it contains 4 double bonds, all in the cis configuration
2. it contains 4 double bonds, all in the trans configuration
3. it contains 4 double bonds, which alternate cis, trans, cis, trans
4. none of the above

Which of the following occurs when rhodopsin absorbs light?
1. the less stable 11,12-cis isomer is converted to the more stable trans isomer
2. the less stable 11,12-trans isomer is converted to the more stable cis isomer
3. the more stable 11,12-cis isomer is converted to the less stable trans isomer
4. the more stable 11,12-trans isomer is converted to the less stable cis isomer

Based on your knowledge of the properties of the analogous alkanes, which of the following is the lightest alkene that you would expect to be a liquid at room temperature?
1. propene
2. 1-pentene
3. 1-heptene
4. 1-nonene

Of the following alkenes, all of which have the molecular formula C₅H₁₀, which would you expect to have the highest boiling point?
1. 4-methyl-1-pentene
2. 4-methyl-2-pentene
3. 2,3-dimethyl-2-butene
4. 2-hexene

Which of the following alkenes, all of which have the molecular formula C₅H₁₀, would you expect to have the lowest boiling point?
1. 4-methyl-1-pentene
2. 4-methyl-2-pentene
3. 2,3-dimethyl-2-butene
4. 2-hexene