Q1: The reason that there is free rotation about any single
sigma bond is because
a- sigma bonds are strong
b- orbital overlap doesn't change with rotation
c- C-C bonds are special
d- rotation leads to a lower energy state
Q2: The reason there is restricted rotation about a C=C double
bond is because
sp2 hybridization is too high in energy
steric effects cause too much repulsion
the 120° bond angle prevents rotation
rotation would eliminate the parallel overlap of the p
orbitals
Q5: When drawing curved arrows, the arrow head always points
towards the Lewis acid.
True
False
Q6: What factors contribute to making something a good EWG?
inductive effects
resonance effects
electronegativity
all of the above
Q7: Given either the presence of a highly electronegative
element that results in good inductive effects, or a group that,
through resonance can delocalize positive charge, which has the
greater effect as an EWG?
a highly electronegative element
a group that is capable of delocalizing positive charge through
resonance
these both have the same effect
it depends upon which is a Lewis acid
Q8: On your own, you can show how electron distribution in the
structure below results in the delocalization of positive charge,
which increases the electronegativity at the terminal carbon
atom.
True
False