The molecular structure of piperitone is represented below.
In such shorthand diagrams, the end of each line segment, if not labelled with a chemical
symbol, corresponds to a carbon atom. Hydrogen atoms bonded to carbon are frequently
not drawn but are always inferred to complete the valence shell for each C atom. Nonbonding electrons for N and O atoms are also omitted from the diagram but can be inferred
to complete those valence shells.
Draw a complete Lewis structure of the molecule and answer the following questions.
Complete the structure by adding ONLY hydrogen atoms to carbon atoms where needed.
You must not create any other bonds. Atoms such as oxygen or nitrogen may have lone
pairs to complete their octets.
Each of the non-hydrogen atoms of this skeletal structure has been randomly numbered.
1.Match the atom number with the orbital hybridization invoked for sigma bonding.
3, 5, 11, 9, 2
2. How many pairs of non-bonding electrons are there in the molecule?
3. How many CH3 (methyl) groups are there in the molecule?
4. How many CH2 (methylene) groups are there in the molecule? (i.e. # of C-atoms having
exactly two bonded H-atoms)
5. How many CH (methyne) groups are there in the molecule? (i.e. # of C-atoms having
exactly one bonded H-atom)
6. How many C-atoms having no bonded H-atoms are there in the molecule?
7. How many -bonds are there in the molecule?
8. How many -bonds are there in the molecule?
9. Determine the molecular formula for this molecule.
Choose appropriate coefficients in the molecular formula below.