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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-CH3Which of the following cyclohexane conformation is (are) consider to be the most stable conformation for cis-1,2-dimethylhexane? I II IIIThe most stable chair conformation of 4-ethyl-1-isopropyl-2-methyl-cyclohexane where the isopropyl group is cis to the ethyl group and trans to the methyl group.
- NO2 HN a) H,C CHy + NO2 b) + H3C CHsNHČCH: CH,NH, NH2Consider the isomers of tert-butylcyclohexanol in conformational structures. Two are cis-2-tert-butylcyclohexanol and two are cis-3-tert-butylcyclohexanol. Indicate which is the more stable conformation for each pair, and indicate which of all four conformations is the most stable. FIX a box OH HO OH A Select the more stable conformation of cis-2-tert-butylcyclohexanol. B OD C B C D ☐A C OH Select the more stable conformation of cis-3-tert-butylcyclohexanol.
- Q/ Name the following polymers: according to the designation based on the International System IUPACOne 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/molFollowing are structural formulas for 1,4-dioxane and piperidine. 1,4-Dioxane is a widely used solvent for organic compounds. Piperidine is found in small amounts in black pepper (Piper nigrum). (a) Complete the Lewis structure of each compound by showing all unshared electron pairs. (b) Predict bond angles about each carbon, oxygen, and nitrogen atom. (c) Describe the most stable conformation of each ring and compare these conformations with the chair conformation of cyclohexane.