Organic Chemistry
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Which of the given compounds can show cis-trans isomerism? Draw the structures of the isomers for the ones that can and write the full names using E-Z nomenclature.a. 1-Bromo-2-methylpenta-1,3-dieneb. 2,3-Dibromopent-2-ene
Identify the compounds which can show cis-trans isomerism.
a. CH2=CH2
b. CH3—CH2—C(CH3)=C(CH3)—CH2—CH3
c. CH3—C(Br)=C(Br)—CH3
d. (Ph)2C=C(CH3)2
Determine the name of the alkene below and indicate whether it is trans or cis.
Determine whether the molecules in the following list have an E or Z configuration.
Write the correct IUPAC names for the following structures:
Determine if the given alkene has an (E) or (Z) configuration.
Draw the structures of cis-trans isomers of the following compounds (if any). Assign cis-trans and E-Z names to the structures where applicable.a. 2,3-Dichlorobut-2-eneb. But-2-ene
Decide whether the given molecule has an E or Z configuration.
Which of the following alkenes show cis-trans isomerism? Draw the structures of the isomers possible in each case and assign the cis-trans (or E-Z) names to the structures.a. Pent-2-ene
b. Propene
The figure below represents a substituted cycloalkane:
Specify whether it is cis or trans.
Determine the configuration (E or Z) of the double bond within the ketone given below.
The Tamoxifen derivative shown below can slow the growth of some breast tumors. Is the Tamoxifen derivative an E or a Z isomer?
Provide the molecule's systematic (IUPAC) name.
Rank, from lowest to highest, the relative priorities of the substituents given below.−Cl −F −OCH3 −CH2CH3
Rank, from lowest to highest, the relative priorities of the substituents given below.
-C(=O)OCH3, -CH2C≡N, -I, -CH2NH2
Specify whether the structure below is an E or a Z if applicable.
Use the IUPAC rules and write the name for the molecule given below.
Determine the name of the structure given below.
Determine the name of the following halogenated compound using the IUPAC rules.
Draw the molecular structures of the compounds given below.
a.(1Z,3Z)-2,4-dichloropenta-1,3-dien-1-ol
b. (2E,4E)-3,5-dichlorohexa-2,4-dien-2-ol
Consider the substituted cycloalkane below:
Determine whether it is cis or trans.
Looking at the geometry of the given compounds, determine each as E, Z, or neither.
Give the name of the alkene in the figure below and indicate whether it is trans or cis.
Show the structures represented by the incorrect names below and write the correct IUPAC names.
(a) (cis-2,cis-4)-hexa-2,4-ene
(b) 2-methyl-1-allyl-trans-ethene
Identify the IUPAC name of the cycloalkane below and specify whether it is cis or trans.
There are two compounds consistent with the formula CH3CH=N—OH. Draw the structures of these compounds and show why only one compound is known with the formula (CH3)2C=N—OH.
Consider the following alkene:
Determine whether it is an E or a Z, if applicable.
Determine the IUPAC name of the following molecule.
Write the systematic name for the following polyene.
Determine if the given molecule has an E or Z configuration.
Determine the configuration (E or Z) of the double bond within the alcohol given below.
Rank the groups or atoms in each of the following sets according to their relative priorities.
a. —C(CH3)3, —CH2CH2Cl, —Br, —CH2CH2CH2Cl.
b. —CH=CHCH3, —CH2CH2CH3, —CH2CH3, —C(CH3)=CH2
What is the systematic name of the following molecule?
Select all that represent stereoisomers of 3-bromohexa-2,4-diene from the following drawings and E-Z nomenclature names.
Indicate whether the following alkene is an E or a Z.
Identify which of the given alkenes can show geometric (cis-trans) isomerism. Draw both isomers where possible.a. CH2=CCl2b. ClCH=CHClc. CH3CH=CH2
a. —CH2NH2, —CH2CH3, —NH2, —CH2CH2NH2
b. —CH2Cl, —CH(CH3)2, —CH2NH2, —CH2I
Provide the structures of two different cis isomers and two different trans isomers for the following compound 1−ethyl−2−methylcyclohexane:
For the given molecules, draw the structures of cis-trans isomers where possible. Provide a cis or trans (or E-Z) name for each of these structures.a. 1,2-Dichlorocyclopentaneb. 3-Ethylpent-2-ene
Determine the configuration (E or Z) of the double bond within the given carboxylic acid.
Give the appropriate IUPAC names for each of these compounds.
Write the Z isomer of an alkene if one of the sp2 carbon has a Cl and a CH2CH3 groups, while the other sp2 carbon has a H and a CH2CH3 groups.
Determine the structures that represent different compounds. Determine the structures that represent the same compound.
Indicate whether the alkene below is an E or a Z, if applicable.
Looking at the substituents around the double bond in each of the given structures, decide whether they can show geometric isomerism or not. For the ones that can, draw the structures of the isomers with their names using E-Z nomenclature.a. 1-Chlorobuta-1,3-dieneb. 3-Chloropent-2-ene
Draw the structure for the alkene (Z)-3-ethyl-2,5-dimethylhex-3-ene.
-CH2OCH3, -CH2Br, -HCCH, -CH2NH2
Some of the compounds given below show cis-trans isomerism while others do not. For those that do, draw the structures of both cis and trans isomers.a. HC≡CHb. CH3CH2CH=CHCH2CH3c. Br2C=C(CH3)2
Identify which of the compounds given below can show cis-trans (geometric) isomerism. Draw both isomers where possible.a. CH3CH=NHb.
c. CH3CH2CH=C(CH3)CH2CH3
Draw the structure for the corresponding IUPAC name (E)-2,6-dimethylhept-3-ene.
Provide the structure of the alkene with the name (Z)-3-bromo-2-cyclobutyloct-2-ene.
Draw the structures of the cis and trans isomers of 1-tert-butyl-4-methylcylohexane.
Draw the five constitutional isomers of C4H8. Which can exist as cis/trans isomers?
Consider the structure of a dodecatetraene shown below:
Provide its systematic name. Use E and Z in naming to designate the configuration of the double bonds, if necessary.
Show the correct condensed mixed structures of the compounds listed below.
(i) (Z)-1,2,4-trichlorobut-2-ene
(ii) (E)-3-methylhex-2-ene
(iii) (Z)-1,2-dichloro-3-isopropylhex-1-ene
Show the skeletal structures for the two geometric isomers of the following compound.
Provide a reason why the boiling point of cis-1,2-dibromoethene is higher than trans-1,2-dibromoethene.
An E, Z system of nomenclature can exist for N-methylethanimine stereoisomers. The lone pair is prioritized the least.
Draw the structures of the compounds listed below.a. (E)-1-phenylethan-1-one oximeb. (Z)-N-methyl-1-phenylethan-1-imine
Show the structures of the stereoisomers of 5-bromo-2-methylocta-3,5-diene. Identify the double bonds that can be labeled as cis or trans.
Determine if 1,1-diethyl-3-isopropylcyclohexane is capable of cis-trans isomerism, and draw those isomers if possible.
Determine if 1-bromo-3-isopropylcyclopentane is capable of cis-trans isomerism. If possible, draw the cis and the trans isomers.
Draw the structures of the following compounds.
(a) cyclohexa-1,4-diene
(b) cyclohepta-1,3,diene
(c) (Z)-3,4-dimethylpent-2-ene
Which among these compounds do you think will demonstrate cis-trans isomerism?
a. hex-1-ene
b. hex-2-ene
Draw the isomers and name them using cis-trans or E-Z nomenclatures.
Does the following molecule show geometric isomerism? If yes, then draw its cis-trans isomers.
Show the bonding in cis-but-2-ene using the molecular orbital picture.
Draw the skeletal structures of the cis and trans isomers of CH3CH2CH=CHCH(CH3)2.
Draw the skeletal structures of the cis and trans isomers of CH3C(Br)=C(Br)CH3.
a. Draw the condensed formula of all alkenes with molecular formula C5H10, and assign systematic names to each. (ignore stereoisomers)
b. Identify the alkenes which can show E and Z isomerism.
c. Identify the most stable and the least stable alkene among them.
Draw and label cis/trans isomers for the compound that may exist as cis and trans isomers.1. CH3CH2CH=CHCH2CH32. CH3C(CH3)=CHCH3
Draw the structures of the cis and trans isomers of 1-bromo-2-ethylcyclopentane.
Draw and label cis/trans isomers for the compound that may exist as cis and trans isomers.1. (CH3)2CHC(Br)=C(Br)CH(CH3)22. Br2C=C(CH3)CH2CH3
Determine the structures along with the IUPAC names of all possible alkynes that have the molecular formula C5H8.
Show the structure of cis-Cl-CH=C(Cl)-CH2CH3 with complete geometry around the double bond. Now, by drawing the trans isomer compare the number of coplanar atoms in both.
Determine from the given structures below those that portray the same molecule and those that show different molecules.
Name the following structures appropriately.
Draw the structures of the following alkenes:
(i) 4-methylene-3-vinylcyclopent-1-ene
(ii) (Z)-4-chloro-2,3-dimethyl-hex-3-ene
Illustrate the structure of a compound with the name (2Z,4Z,7E)-6-methylnona-2,4,7-triene.
Draw the structure of (R,E)-6-chlorohex-4-ene-1,2-diol.
Provide the structure that is compatible to the IUPAC name (3S,4S,5R)-octane-3,4,5-triol.
According to IUPAC rules, what is the name of the following compound?
Determine the structure that is compatible with the name (1S,4S)-4-methylcyclopent-2-en-1-ol.
What is the IUPAC name of the following molecule?
Draw geometrical isomers of the following molecule and name each one.
3-ethylocta-3,5-diene
Illustrate geometrical isomers of the following molecule and name each one.
hexa-1,4-diene