Draw the structure of the following molecules, for which the name is given. 1. most stable conformation of 1,1-dichloro-2-bromoethane 2. N,N-Dimethylacetamide 3. cyclooctatetraene
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Draw the structure of the following molecules, for which the name is given.
1. most stable conformation of 1,1-dichloro-2-bromoethane
2. N,N-Dimethylacetamide
3. cyclooctatetraene
4. bicyclo[2.2.1]heptane
5. spiro[2.4]heptane
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- Draw the structure of the following molecules, for which the name is given. each) 1. cyclopentylethene 2. 4-chloro-2-methylcyclohexanone 3. 3,4-dimethylcyclohexene 4. cis 3-methyl-2-pentene 5. trans-2,3-butanediol 6 most stable conformation of 1,1-dichloro-2-bromoethaneH3C - What is the name of the shown compound ? S-methylcyclooct-4-ene 1. R-5-methylcyclooctene 2. O 3. S-6-methylcyclooctene 14.R-6-methylcyclooctene S-5-methylcycloocteneWrite structures for the following compounds. a-) 3- ethyl -4- methylhexane b-) 3- ethyl-5- isobutyl-3- methylnonane c-)4-tert-butyl- 2- methylheptan-3-ol d-) 4- bromo- 7- methylbicyclo[3.2.2]nonane
- Draw a structure for 1,1-dichloro-3-propoxycyclopentane. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • In cases where there is more than one answer, just draw one. opy astea. Draw the lowest energy conformation for the compound shown in the image. b. Draw the complete structural formula of the following compound: cis-1-bromo-3-chlorocyclohexane.: How many stereoisomers are possible for each of the following structures? Draw them, and name each by the R-S and E-Z conventions. (See Problem 5.41.) a. 2,5-dichloro-3-hexene b. 2-chloro-5-fluoro-3-hexene c. 3-methyl-1,4-pentadiene d. 3-methyl-1,4-heptadiene
- 8. The heat of combustion (per CH₂) of several cycloalkanes is listed below. Based on the data given, which of these cycloalkanes would be considered most stable? Heat of combustion (kJ/CH₂) -686.5 -664.0 -663.6 -659.0 (A) cyclobutane (C) cyclooctane Cycloalkane cyclobutane cyclopentane cyclooctane cyclopentadecane (B) cyclopentane (D) cyclopentadecaneH3C. CH3 What is the systematic IUPAC name of this compound? H;C Select one: a. 1-(3-isopropylcyclohexene-6-yl)ethane b. 3-ethyl-6-(propan-2-yl)cyclohex-1-ene O c. 6-ethyl-3-isopropylcyclohex-1-ene d. 2-(3-ethylcyclohexene-6-yl)propane e. 3-ethyl-6-isopropylcyclohex-1-ene4. Which structure below represents the most stable conformation of cis-1-t-butyl-4-methylcyclohexane? A B D 5. The planar form of which ring would have bond angles close to the tetrahedral value, but is destabilized by eclipsing interactions (torsional strain)? Which of the following statements about conformations is FALSE? A) Conformations can be isolated and separated at room temperature B) Conformations are interconverted by rotation about o-bonds C) For butane the staggered anti conformation is the most stable D) For ethane the eclipsed conformation is the least stable 6. 7. Which of the following compounds has two chirality centers? .H H. H3C
- 9) There are 3 different cyclopropane molecules with the formula GHĄC12. a. Draw and build the 3 molecules. b. Below each drawing, name each molecule with correct nomenclature. Label a pair that are constitutional isomers. d. Label a pair that are stereoisomers (or configurational isomers). С.The chemical structure of propane (C3H3) is provided below. Which of the following isomers is propane able to form? Briefly justify your answer (2- 3 sentences) A. Structural isomer B. Cis-trans isomer C. Enantiomer D. All of the above E. None of the above н ннн H-C-C-C-H H. ннн H.2. Draw the correct structure for each given name below. a. 1-butyl-3-ethyl-2-propylcycloheptane b. cis-1,3-diisopropylcyclohexane c. cyclobutylcyclohexane