Chapter 1: Q12P (page 2)
Determine the partial negative charge on the fluorine atom in a C-F bond. The bond length is 1.39 1.39A* , and the bond dipole moment is 1.06D. The charge on an electron is 4.80⨯10-10esu.
The partial negative charge over fluorine in the bond is 0.24 D.
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Calculate the percentages of α-d-glucose and β-d-glucose present at equilibrium from the specific rotations of α-d-glucose, β-d-glucose, and the equilibrium mixture. Compare your values with those given in Section 20.10. (Hint:The specific rotation of the mixture equals the specific rotation of α-d-glucose times the fraction of glucose present in the α-form plus the specific rotation of β-d-glucose times the fraction of glucose present in the β-form.)
According to the potential maps for ammonium ion, which atom has the greatest electron density?
Predict whether He2+ exist?
If the dipole moment of CH3F is 1.847 D and the dipole moment of CD3F is 1.858 D, which is more electronegative: hydrogen or deuterium?
A tertiary amine reacts with hydrogen peroxide to form a tertiary amine oxide.
Tertiary amine oxides undergo a reaction similar to the Hofmann elimination reaction (Section 10.10), called a Cope elimination. In this reaction, a tertiary amine oxide, rather than a quaternary ammonium ion, undergoes elimination. A strong base is not needed for a Cope elimination because the amine oxide acts as its own base.
Does the Cope elimination have an alkene-like transition state or a carbanion-like transition state?
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