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- Distinguish between isomerism and resonance. Distinguish between structural and geometric isomerism. When writing the various structural isomers, the most difficult task is identifying which are different isomers and which are identical to a previously written structurethat is, which are compounds that differ only by the rotation of a carbon single bond. How do you distinguish between structural isomers and those that are identical? Alkenes and cycloalkanes are structural isomers of each other. Give an example of each using C4H8. Another common feature of alkenes and cycloalkanes is that both have restricted rotation about one or more bonds in the compound, so both can exhibit cis- trans isomerism. What is required for an alkene or cycloalkane to exhibit cis-trans isomerism? Explain the difference between cis and trans isomers. Alcohols and ethers are structural isomers of each other, as are aldehydes and ketones. Give an example of each to illustrate. Which functional group in Table 21-4 can be structural isomers of carboxylic acids? What is optical isomerism? What do you look for to determine whether an organic compound exhibits optical isomerism? 1-Bromo-1-chloroethane is optically active whereas 1-bromo-2-chloroethane is not optically active. Explain.1. Name and draw the isomers form from the given molecular formula. a. C₂H16 b. C4H,Br₂ 2. Draw the structure of each of the following cycloalkanes a. 1-Bromo-2-methylcyclobutane b. 1,2-Dibromo-3-methylcyclohexaneConstitutional isomers are compounds which have the same molecular formula but different structural formulae. They are different compounds with different physical and chemical properties.a. Rearrange your model of n-hexane to make as many possible isomers of C6H14 as you can. Draw the structural formula and write down the IUPAC name for each isomer that you make.b. Constitutional isomers can also have different functional groups. Make all possible isomers of C3H8O. Write down the structural formulae and IUPAC names for all the compounds you make. Hint: Consider alcohol and ether functional groups.
- 1. Octane, C8H18, has 18 different constitutional or chain isomers. One of them, isooctane, is used as a standard in determining the octane rating of gasoline a. Draw the structural formulas for at least ten chain isomers of octane. b. Give the IUPAC name of each. C. Which of the isomers that you have drawn has the highest boiling point? Which has the lowest boiling point? Rationalize.What is the condensed structural formula for 3,3-diethyl-2-methylhexane? A. CH3CH2CH(CH2CH3)CH2(CH3)CH2CH3 B. CH3CH2C(CH2CH3)2CH2(CH3)CH2CH3 C. CH3CH(CH3)C(CH2CH3)2CH2CH2CH3 D. CH3C(CH3)2C(CH2CH3)2CH2CH2CH313. Ethylethanoate and butanoic acid can be classified as A. positional isomers B. chain isomers C. functional isomers D. stereoisomers 14. Which of the following pairs are positional isomers A. trans-1,4-dichlorocyclohexane, cis-1,3-dichlorocyclopentane B. trans 1,4-dichlorocyclohexane, cis-1,4-dichlorocyclohexane C. 2-pentanol, Cyclopentanol D. 1,2-cycohexanediol, 1,3-cycohexanediol 15. Which of the following compounds will have zero dipole moment? A. cis-1,2-dibromoethylene B. 1,1-dibromoethylene C. trans-1,2-dibromoethylene D. all of these 16. Which of the following is not aromatic: A. cyclopentadienyl cation B. cyclopentadienyl anion C. Cyclopropenyl cation D. Cycloheptatrienyl cation 17. Which of the following compounds containing lone pair has the least tendency to donate its electrons? A. the lone pair in pyridine B. the lone pair in furan C. the lone pair in pyrole D. the lone pair in thiophene
- 1. Octane, C8H18, has 18 different constitutional or chain isomers. One of them, isooctane, is used as a standard in determining the octane rating of gasoline a. Draw the structural formulas for at least ten chain isomers of octane. b. Give the IUPAC name of each. C. Which of the isomers that you have drawn has the highest boiling point? Which has the lowest boiling point? Rationalize. 2. Which of the following structural formulas represent identical compounds and which represent constitutional/structural isomers? Identical compounds: Constitutional isomers: a). CH3CH2CHCH3 e). CH2CH2CHCH3 CH3 i). CH3-C-CI ČI CI CI CH3 CH2CI b). CH3-C-CH3 f). CH3CH2CH2CH,CI j). CICH2 CI CH3 g). CICH,CHCH3 CH2CI k). CH3-CH-CH3 CI c). CH,CHCHCH3 CI h). CH3CHCH2CH2CI CH2CH3 1). CH3CHCI d). CI CIWrite skeletal formulas for the following alkanes and cycloalkanes. Use solid and broken lines to indicate stereochemistry. a.3-ethyl-2,4,5-trimethyloctane b.4-(1-methylethyl)octane c.5-butyl-2,2-dimethylnonane d.trans-1,3-dimethylcyclopentane e.cis-1,2-diethylcyclobutane1. Which of the following families of organic compounds share the same general molecular formula with normal chain alkynes? a. Alkanes and alkenes b. Alkanes and bicycloalkanes c. Cycloalkenes and bicycloalkanes d. Cycloalkenes and alkenes e. Cycloalkanes and cycloalkenes
- 4. MAINIDEA Compare and contrast alkyl halides and aryl halides. 5. Draw structures for the following molecules. a. 2-chlorobutane c. 1,1,1-trichloroethane b. 1,3-difluorohexane d. 1-bromo-4-chlorobenzene 6. Define functional group and name the group present in each of the following structures. Name the type of organic compound each substance represents. a. CH3CH,CH2OH b. CH;CH,F c. CH;CH,NH2 7. Evaluate How would you expect the boiling points of propane and 1-chloropropane to compare? Explain your answer. d. CH3C- OH 8. Interpret Scientific Illustrations Examine the pair of substituted hydrocarbons illustrated at right, and decide whether it represents a pair of optical isomers. Explain your answer.16. Which of the following chemical formulas is best used for isomers such as butane and isobutane?A. Empirical formulaB. Molecular formulaC. Crystal formulaD. Structural formula17. Which of the following scenarios DOES NOT point to the procurement of an assay?A. a certain type of grass is collected from a forest, and was analyzed for its overall mercury (Hg) content in its rootsB. a blood sample was taken from a dead dolphin for a complete genome sequencingC. human saliva is collected for the testing of covid-19 genomeD. a sample of urine was collected from a suspected drunk driver for analysis of phenolic compounds18. Jet is an undergraduate chemistry student, he’s out in the laboratory trying to determine the volatile organic compounds as well as overall protein content of the leaf and stem of a malunggay(Moringa oleifera). He subjected the leaf and stem in a separate digestion reaction (treatment of sulfuric acid), afterwards he subjected the products to high temperature induction…1. what grouo does the ff organic compound belong? a. ketone b. ether c. cyloalkane d. esther 2. what group does the ff organic compound belong? a. amide b. azo c. nitrile d. amine 3. what is the priority functional group of the ff organic compound? a. carboxyl b. hydroxyl c. carbonyl d. hydroxide