A correct name for the following compound is: Br O 4-bromo-3,8-dimethylbicyclo[5.2.0]nonane O3,8-dimethyl-4-bromo-bicyclo[5.2.0]nonane O7-bromo-2,6-dimethylbicyclo[5.2.0]nonane O4-bromo-3,8-dimethylbicyclo[5.2.2]nonane O 4-bromo-3,8-dimethylbicyclo[5.2.1]decane
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- What is the IUPAC name of the following: CH3-CH2-C≡CH CH3-CH2-CH=CH-CH2-CH2-CH3 CH2=CH2 CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH3 CH3-CH=CH-CH2-CH2-CH3 CH≡C-CH2-CH2-CH3 CH3-CH2-CH2-CH2-CH3 CH3-CH2-C≡C-CH2-CH3 CH3-CH2-CH=CH-CH2-CH2-CH2-CH3 CH3-CH3Choose the CORRECT IUPAC name for the following compound. CI O 2-Chlorobicyclo[3.2.0]heptane O 4-Chlorobicyclo[5.4.2]heptane O 2-Chlorobicyclo[5.4.2]heptane O 4-Chlorobicyclo[3.2.0]heptaneOne of the chair conformations of cis-1-chloro-3-methylcyclohexane is more stable than the other by 15.5 kJ/mol. Use this, and the table below, to estimate the energy cost of a 1,3-diaxial interaction between a chlorine atom and a methyl group. 1,3-Diaxial Strain Energies for Monosubstituted Cyclohexanes kJ/mol Substituent Substituent kJ/mol -NH2 -CN, cyano 0.4 2.95 -F 0.5 -COOH 2.95 -C=CH, ethynyl 0.85 -CH=CH2 3.55 -CH3 -I 0.95 3.64 -CH2CH3 -Cl 3.65 1.1 -CH(CH3)2 1.2 4.5 -Br -C(CH3)3 10.5 -ОН 1.95 -CGH5 6.3 (Round your answer to one decimal place.) kJ/mol
- Q1* S 1,3-dithiane 1,3-dithiine 1,4-dithiene 1,4-dithiane X 7-oxaspiro[5.6]dodecane 1-oxaspiro[5.6]dodecane Both are wrong Q2* Q3 * 3-methyl-2-thiabicyclo[2.2.2]octane 2-methyl-1-thiabicyclo[2.2.2]octane Both are right VA24. Trans-Decalin is more stable than its cis isomer, but cis-bicyclo[4.1.0] heptane is more stable than its trans isomer. Explain. H фф Н H trans-Decalin cis-Bicyclo[4.1.0]heptaneCalculate the energies of the cis-axial and cis-equatorial conformations of cyclohexane-1,3-diol. cis-axial = _____ kcal/mol cis-equatorial = _____ kcal/mol Does the stability of the two conformations match with what you would expect? Why or why not?
- Build trans-1,4-dichlorocyclohexane of chair form. Build cis-1,4-dichlorocyclohexanes of chair form. Which one is more stable of cis-1,4-dichlorocyclohexane and trans-1,4-dichlorocyclohexane? Draw their conformations that show the chloro atoms in axial or equatorial positions.Strain Energies for Monosubstituted Cyclohexanes Substituent kJ/mol Substituent kJ/mol -CN, cyano -F -I -C=CH, ethynyl 0.85 -CI -Br -OH -C6H5 0.4 Br 0.5 NC 0.95 1.1 1.2 6.3 -NH₂ Br. -COOH CN -CH=CH₂ 1.95 -C(CH3)3 -CH3 2.95 2.95 3.55 3.64 -CH₂CH3 -CH(CH3)2 4.5 Click on the following structures that represent the most stable conformation of trans-1-bromo-3-cyanocyclohexane. 3.65 10.5 Br CN Br -CNSelect the best name for the given compound. H. Select the name. O trans-bicyclo[3.2]heptane O trans-bicyclo[3.2.0]heptane O trans-bicyclo[0.2.3]heptane cis-bicyclo[3.2.0]heptane cis-bicyclo[3.2]heptane O cis-bicyclo[0.2.3]heptane
- Which compound is more stable: cis-1,2-dimethylcyclopropane or trans-1,2- dimethylcyclopropane? Explain your answer.PART III. CONFORMATIONAL ANALYSIS OF SUBSTITUTED CYCLOHEXANES Strain energy—diaxial 1,2-dimethylcyclohexane 29. Me–C–C–Me dihedral angle—diaxial 30. Strain energy—diequatorial 1,2-dimethylcyclohexane 31. Me–C–C–Me dihedral angle—diequatorial 32. Strain energy—axial-equatorial 1,2-dimethylcyclohexane 33. Me–C–C–Me dihedral angle— axial-equatorial 34.10. Identify the higher energy and lower energy forms of two substituted cyclohexanes, for example t-butyl cyclohexane. Which form (t-butyl axial or equatorial) has a higher energy, and why? more stable by 24 kJ/mol H3C,CH3 CH3 C CH3 CH3 HaC-C Ke >1 H. H tert-butyl group axial tert-butyl group equatorial