Concept explainers
(a)
Interpretation:
The explanation for the statement that a nonzero dipole moment supports a puckered structure of trans-
Concept introduction:
Conformation isomers are formed by the rotation about single
(b)
Interpretation:
The more stable conformation of trans-
Concept introduction:
Conformation isomers are formed by the rotation about single
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Organic Chemistry
- (a) which if the structure of trans-1,2-dimethylcyclopentane? (b) which is the most stable conformation of 1-bromo-2-ethylcyclohexane? (c) which is the least stable conformation of 1-bromo-2-ethylcyclohexane? (d) which is the more stable configuration of 1,3-dimethylcyclopentane? *Et = ethylarrow_forwardConsider 1-bromopropane, CH3CH2CH2Br. (a) Draw Newman projections for the conformations in which -CH3 and -Br are gauche (dihedral angles 60° and 300°).arrow_forward(a) Describe the molecular geometry expected for 1,2,3-butatriene (H2C=C=C=CH2). (b) Two stereoisomers are expected for 2,3,4-hexatriene (CH3CH=C=C=CHCH3). What should be the relationship between these two stereoisomers?arrow_forward
- 4.(a). Draw the structures of (i) cis-1,4-Dibromocyclohexane and (ii) trans-1,4- Dibromocyclohexane. 4(b). Draw the most stable conformers of (i) cis-1,4-Dibromocyclohexane and (ii) trans-1,4-Dibromocyclohexane. 4(c)Which is more stable? (i) cis-1,4-Dibromocyclohexane or (ii) trans-1,4- Dibromolcyclohexane. Explain the reason for your choice.arrow_forward(a) Convert each chair cyclohexane to a hexagon with wedges and dashed wedges. (b) Draw a stereoisomer of each compound in its more stable chair conformation.arrow_forwardDraw the alternative chair conformations for the cis and trans isomers of 1,2-dimethylcyclohexane, 1,3- dimethylcyclohexane, and 1,4-dimethylcyclohexane. (a ) Indicate by a label whether each methyl group is axial or equatorial. (b) For which isomer(s) are the alternative chair conformations of equal stability? (c) For which isomer(s) is one chair conformation more stable than the other?arrow_forward
- (a) Draw the most stable chair conformers of trans-1,3-diisopropylcyclohexane and trans-1,4-diisopropylcyclohexane. (b) Which is more stable: trans-1,3-diisopropylcyclohexane or trans-1,4-diisopropylcyclohexane?arrow_forward4. (a) Draw a skeletal (line-bond) structure for 3,4-dimethylhexane. (b) Draw a sawhorse representation of any staggered conformation of this molecule looking down the carbon-3 to carbon-4 bond. (c) Draw a Newman projection looking down the carbon-3 to carbon-4 bond of the same conformation that you drew as a sawhorse representation.arrow_forward(a) Draw and name all five isomers of formula C3H5F.(b) Draw all 12 acyclic (no rings) isomers of formula C4H7Br. Include stereoisomers.arrow_forward
- (a) Draw the anti and gauche conformations for ethylene glycol (HOCH2CH2OH). (b) Ethyarrow_forwardWrite a conformational structure for 1,2,3-trimethylcyclohexane in which all the methyl groups are axial and then show its more stable conformation.arrow_forward(c)Conformational isomer is the different spatial arrangement of the atoms that resulted from rotation about a single bond. (i) Differentiate anti conformers and gauche conformers (ii) Using a newman projection, draw the anti conformer and gauche conformers of 3,3-dimethylheptane (viewed along the C3-C4 bond)arrow_forward
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