Question

Answer True or false for the following questions.

1) There are eleven σ bonds in this molecule?

2) There are three lone pairs of electrons in the complete Lewis structure?

3) The C-N bond is formed from overlap of an sp3 hybrid orbital from the carbon atom with an sp2 hybrid orbital from the nitrogen atom?

4) An sp2 hybrid orbital on C-1 overlaps with an sp3 hybrid orbital on C-2 to form the sigma bond between C-1 and C-2?

5) There are four π bonds in this molecule?

6)The C-2 and C-3 atoms cannot rotate about the internuclear axis between the two atoms since the σ bond would break?

7) The π bond between C-3 and O is formed by overlap of unhybridized p atomic orbitals?

Answer 1

Sigma bonds are single bonds. In a double bond there is one pi bond and one sigma bond.

1) False, there are 13 not 11.

2) False, there are five not three. Each oxygen has 2 lone pairs(2+2 = 4 total) and the Nitrogen has one lone pair(4 + 1 = 5 total)

3) False. Both carbon #1 and the nitrogen are sp2 according to VSEPR.

4) True.

5) False. There are 2, not 4. Carbon #3 to the oxygen is one and Carbon #1 to the nitrogen is another.

6) False. You can always rotate along single bonds without breaking anything. Double/Triple bonds however you cannot because you would break the pi bonds.

7) True.