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Concept explainers
(a)
Interpretation:
TThe two possible chair conformations for the cis-1-isopropyl-3-methylcyclohexane should be drawn and named every substituent as axial or equatorial and most stable conformer should be selected.
Concept introduction:
when the cyclohexane ring converts from one chair conformation to another, the equatorial hydrogen atoms are converted into axial hydrogen atoms and vice versa.
When the cyclohexane has one substituent then the conformation which contain the substituent in equatorial position is more stable due to less steric strain with axial hydrogen atoms.
When two substituents are present in the structure, in order to find the more stable conformation can be determined by looking at the groups in the axial position.
When a bulkier group present in the axial position, that conformation get less stable.
In cis conformation, both substituents are in the same side.
(b)
Interpretation:
The two possible chair conformations for the cis-4-tert-butylcyclohexanol should be drawn and named every substituent as axial or equatorial and most stable conformer should be selected.
Concept introduction:
when the cyclohexane ring converts from one chair conformation to another, the equatorial hydrogen atoms are converted into axial hydrogen atoms and vice versa.
When the cyclohexane has one substituent then the conformation which contain the substituent in equatorial position is more stable due to less steric strain with axial hydrogen atoms.
When two substituents are present in the structure, in order to find the more stable conformation can be determined by looking at the groups in the axial position.
When a bulkier group present in the axial position, that conformation get less stable.
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Chapter 26 Solutions
EP GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
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- The dissociation of the weak acid, nitrous acid, HNO2, takes place according to the reaction: HNO2 (aq) ⇌ H+(aq) + NO2–(aq) K=7.2 X 10-4 When 1.00 mole of HNO2 is added to 1.00 L of water, the H+ concentration at equilibrium is 0.0265 M.A) Calculate the value of Q if 1.00 L of water is added? B) How will reaction shift if 1.00 L of water is added?arrow_forwardSuppose a certain copolymer elastomeric material “styrene-butadiene rubber”) contains styrene ("S") monomers –(C8H8)– and butadiene ("B") monomers –(C4H6)– and that their numerical ratio S:B = 1:8. What is the mass ratio mS:mB of the two monomers in the material? What is the molecular mass M of a macromolecule of this copolymer with degree of polymerization n = 60,000? Data: AC = 12.01 u, AH = 1.008 u.arrow_forwardLab Questions from Lab: Gravimetric Determination of Calcium as CaC2O4•H2O What is the purpose of the methyl red indicator? Why does a color change to yellow tell you that the reaction is complete? Why is the precipitate rinsed with ice-cold water in step 4? Why not room temperature or hot water? Why is it important that the funnels be placed in a desiccator before weighing (steps 1 and 5)?arrow_forward
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