3. For each of the following structures:
i) Draw the Lewis structure of any other resonance contributors.
ii) Indicate on the structure the site of a formal charge other than zero on any atom.
a)
b)
c)
4. For each of the following species:
i) Draw the Lewis structure.
ii) Predict the molecular shape around the central atom (carbon).
iii) Give the hybridization of the central atom.
a) \( \mathrm{CH}_{2} \mathrm{Cl}_{2} \)
b) \( \left(\mathrm{CH}_{3}\right)_{2} \mathrm{CO} \)
c) \( \mathrm{CO}_{2} \)
5. Indicate whether the following pairs of formulas represent the same compound, constitutional isomers, or stereoisomers.
a)
and
b)
and
c)
and
d)
and
e)
and
f)
and