Interpretation:
The explanation of the way in which the given
Concept introduction:
The naming of the chiral center and geometric isomers are based on Cahn-Ingold-Prelog priority rules. If the priority assigned to each group attached to the chiral center in a molecule is in a clockwise direction, then it is the R-stereoisomer, and if this is counter-clockwise, then it is the S-stereoisomer. R and S-stereoisomer are mirror images of each other.
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- 1)Chemistry students are taking an experimental course in organic chemistry at a public university. During an experiment involving conjugated dienes, some doubts arose when discussing the results obtained so far: (a) A student obtained two products from the reaction of 1,3-cyclohexadiene with Br2. His lab partner was surprised to get only one product from the reaction of 1,3 - cyclohexadiene with HBr. Explain these distinct results. (b) One student, seeing the discussion of colleagues, commented that she obtained two distinct products when reacting 1,3,5-hexatriene with HBr, with different yields just by changing the reaction temperature. Explain the results she obtained using reaction mechanism and based on kinetic and thermodynamic control involving conjugated dienes.arrow_forward2. (a) The heat of combustion of liquid benzaldehyde (C6H5CHO) is -3393 kJ/mole, and that of liquid 2,4,6-cycloheptatrien-1-one (C₂H6O) is -3470 kJ/mole. Assume that both combustions result in products, CO2 and H₂O, that are entirely in the gas phase. Using the standard chemical equation for the combustion of a hydrocarbon, find the heats of formation (in kJ/mol) for both benzaldehyde and 2,4,6-cycloheptatrien-1-one in the liquid phase. (b) Consider the isomerization from 2,4,6-cycloheptatrien-1-one to benzaldehyde. What is the enthalpy change (in kJ/mol) for this reaction? Is it endothermic or exothermic? (c) If ArxnS = -18 J/mol-K for the isomerization reaction, find ArxnG at 350 K (in kJ/mol) and determine if it is spontaneous in the liquid phase at this temperature. For this calculation, you may assume that ArxnH and ArxnS are constant between 300 and 350 K.arrow_forwardDraw the structure of the following three isomeric acid chlorides with chemical formula C,H,CIO. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Consider E/Z stereochemistry of alkenes. • In cases where there is more than one answer, just give one. Acid chloride #1: (E)-4-hexenoyl chloride C P aste орy ..." ChemDoodle Acid chloride #2: (Z)-3-hexenoyl chloride Previous Next Email Instructor Save and Exitarrow_forward
- Bromine reacts with alkenes in methanol according to the equation (see image 1). When this reaction was carried out with 4-tert-butylcyclohexene, only one isomer was formed with the molecular formula C12H23BrO (80% yield) a) Which of the following is the structure more reasonable for this compound? (see image 2) b) Explain your reasoning through a corresponding mechanismarrow_forwardProvide the systematic name for each of the following isomeric acid chlorides with the chemical formula C,H9CIO. (Be sure to indicate double bond stereochemistry using (E) and (Z) notation. Indicate stereochemistry in rings with the terms cis or trans. Do NOT use (R) or (S) designations. It is not necessary to use italics in writing compound names. Write compound names in lower case. Use upper case for the double bond stereochemistry terms.) Visited ** ball & stick + labels ball & stick labels ball & stick labelsarrow_forwardGive the IUPAC name of the product that would form when the following cycloalkene undergoes catalytic hydrogenation. CH3 Name of product Submit Answer = CH3 Retry Entire Group 9 more group attempts remaining Previous Next Save anarrow_forward
- 2. What can you infer about the nature of the substituents? Provide at least two inferences and explain your basis using reliable sources.arrow_forwardProvide the systematic name for each of the following isomeric acid chlorides with the chemical formula C-H₂CIO. (Be sure to indicate double bond stereochemistry using (E) and (Z) notation. Indicate stereochemistry in rings with the terms cis or trans. Do NOT use (R) or (S) designations. It is not necessary to use italics in writing compound names. Write compound names in lower case. Use upper case for the double bond stereochemistry terms.) ball & stick + labels ball & stick-+ labels ball & stick - + labels DOarrow_forwardDraw the structural formula of the major product of the reaction of (S)-2,2,3-trimethyloxirane with Me,NH. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Include H atoms at chiral centers only. • If a group is achiral, do not use wedged or hashed bonds on it.arrow_forward
- Provide the systematic name for each of the following isomeric acid chlorides with the chemical formula C-H₂CIO. (Be sure to indicate double bond stereochemistry using (E) and (Z) notation. Indicate stereochemistry in rings with the terms cis or trans. Do NOT use (R) or (S) designations. It is not necessary to use italics in writing compound names. Write compound names in lower case. Use upper case for the double bond stereochemistry terms.) ball & stick ✓-+ labels styl ball & stick + labels ball & stick ✓ - + labels 00arrow_forward(4) Please help me answer this problem. Thank you very mucharrow_forwardOn a separate sheet of paper, draw the two alternative chair conformations for the product formed by the addition of bromine to 4-tert-butylcyclohexene. The Gibbs free-energy differences between equatorial and axial substituents on a cyclohexane ring are 21 kJ/mol for tert-butyl, and 2.3 kJ/mol for bromine. Calculate the ratio of the two observed products at 42.0 °C using the following equation: AG° = –RT In Keq The gas constant, R, is 8.314 J/K•mol. (Enter your answer to two significant figures.) Ratio: 100 to 1 Major Minorarrow_forward
- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks Cole