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- Explain briefly and clearly the following concepts, taking as reference the molecule of n-butane and the corresponding drawings or illustrations. See pages 149-152 of the book Organic Chemistry, sixth edition (J. G. Smith). 4. What is steric hindrance in a conformation? Then draw a picture to illustrate the concept? 5. What is the torsional stress of a conformation? Then draw a picture to illustrate the concept? 6. Describe 1,3-diaxial interaction and illustrate with a specific example.Draw a three-dimensional structure for each compound, and star all asymmetric carbon atoms. Draw the mirror image for each structure, and state whether you have drawn a pair of enantiomers or just the same molecule twice. Build molecular models of any of these examples that seem difficult to you. cis-1,2-dichlorocyclobutaneDraw the skeletal (line-bond) structure of "(R)-3-ethylhex-1-ene". Useing a dash or wedge bond to indicate the stereochemistry of the substituents on the asymmetric centers, where applicable.
- For the following compound - calculate the degrees of unsaturation and enter that number into the space provided.show the completed mathematical calculation. Figures form Academia Obscura (anthonycrasto.wordpress.com)Draw the structural formula for at least one bromoalkene with the molecular formula C5H9Br that shows: Q.)E,Z isomerism but not chiralityDraw the conformational analysis of 1-bromobutane looking at the C1-C2 bond. Provide the appropriate names for each conformation.
- Identify the stereogenic carbon in (S)- and (R)-limonene, rank the substituents around it and rationalize the assignment of their stereochemical configurations. Hint: When ranking carbons that have multiple bonds, consider the bolded carbon of C=C being connected to 2 carbons and the bolded carbon of C≡C being connected to 3 carbons.Draw a skeletal (line-bond) structure of (R)-2,3- dimethylheptane. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where apDraw the structural formula for at least one bromoalkene with the molecular formula C5H9Br that shows: Q.Chirality but not E,Z isomerism
- Calculate the degree of unsaturation for the molecular formula C6H11FS and draw a structure for the formula with a cyclohexane ring.On being heated with a solution of sodium ethoxide in ethanol, compound A (C7H15Br) yielded a mixture of two alkenes B and C, each having the molecular formula C7H14. Catalytic hydrogenation of the major isomer B or the minor isomer C gave only 3-ethylpentane. Suggest structures for compounds A, B, and C consistent with these observations.Two constitutional isomers with molecular formula C2H6O have boiling points of –23.6°C and 78.4°C. Draw both constitutional isomers of C2H6O (or provide the name). Identify the structural class of each. Match the constitutional isomers you have drawn to the boiling points provided above, and explain your reasoning.