Concept explainers
Interpretation:
The most stable conformer of the given molecule has to be drawn.
Concept introduction:
Conformers: The different spatial arrangements of the atoms the result from rotation about a single bond is called conformational isomers.
Stereoisomerism (or) geometric isomerism: It is known as cis-trans isomerism or E-Z isomerism is a form of stereoisomerism the each of two or more chemical compounds having the same molecular formula but a different geometric arrangement; an unsaturated compound or ring compound in which rotation around a carbon bond is restricted, as in (cis) and (trans) configurations know as geometric isomerism.
Relative stability of cyclohexane: The most stable conformation of cyclohexane is the chair shown to the right, the respective carbon (-C-C-) bonds are it close to (109.50), it is almost free of angle strain, it is also a fully staggered conformation and so is free of torsional strain. So the chair conformation is the most stable conformation.
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Check out a sample textbook solutionChapter 3 Solutions
Essential Organic Chemistry, Global Edition
- For the molecule shown below, draw both chair conformations and circle which is the lower energy conformer. .CI "CIarrow_forwardDraw Newman projections of the following molecules viewed from the direction of the blue arrows.arrow_forwardDraw Newman projects of all the staggered conformations for the molecule below looking along the bolded bond in the direction indicated by the arrow. The carbon closest to the arrow should be the front carbon of your Newman projection. (It is a practice problem from the book but I am confused about how to approach it.)arrow_forward
- a) Draw all Newman projections of your molecule's conformations in which the CH3 group and the H of the CHY2 group are positioned 'ANTI' to each other. Be sure to put in the correct X and Y atoms, bonded to the correct C atoms, for your molecule. X = FY=I Conformations = 60 deg and - 180 deg 60 deg dihedral angle = - 179.987 deg 180 deg · - dihedral angle = 179.814 degarrow_forwardPredict the most stable conformation for each of the following molecules. Brietly explain why your conformer is the more stable conformation. a) b) OH OHarrow_forwarda) i) Draw the Newman projections for the conformations of ethane (staggered and eclipsed) Which is higher in energy? Which is more stable? Next to each conformer, draw the equivalent ‘sideways’ view, using wedged bondsarrow_forward
- Draw the Newman projection so that it corresponds to the molecule and conformation shown when viewed down the red bond in the direction of the arrow.arrow_forwardDraw the Newman projection so that it corresponds to the molecule and conformation shown when viewed down the red bond in the direction of the arrow. Br H₂C OH One or more chemical symbols or groups are incorrect.arrow_forwardWhich of the following conformers has the highest energy (the least stable)?Justify your choicearrow_forward
- 6. Using Newman projections, draw each of the following molecules in its represented conformation with respect to the bond indicated. Use squares to type in appropriate substitution. a) Bond view C2-C3 H₂C % CH3arrow_forwarda) Sighting along its C-N bond, draw the Newman projection of the conformation of dimethylamine given in perspective below. (Note the presence of the lone pair of electrons on the nitrogen.) H H C-N H CH3arrow_forwardDraw both chair conformers for the following molecule and circle the most stable conformation.arrow_forward
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