NaNC or Sodium Nitrite is an ionic compound that has a specific chemical structure and types of bonds. The structure and bond types can be explained as follows:

Structure:
- NaNC has a crystalline structure.
- It consists of sodium cations (Na+) and nitrite anions (NO2-).
- The nitrite anion has a trigonal planar shape, with the nitrogen atom at the center and two oxygen atoms at either end.
- The sodium cation is surrounded by six nitrite anions, forming an octahedral coordination complex.
- The chemical formula of NaNC is NaNO2.

Types of Bonds:
- The bond between sodium cation and nitrite anion is an ionic bond.
- In an ionic bond, electrons are transferred from one atom to another, resulting in the formation of charged ions that are attracted to each other by electrostatic forces.
- Sodium has a single valence electron in its outermost shell, while nitrite has two lone pairs of electrons on the nitrogen atom and a single bond with one oxygen atom.
- Sodium transfers its valence electron to one of the oxygen atoms of the nitrite anion, forming a sodium cation and a nitrite anion with a negative charge.
- The electrostatic attraction between the oppositely charged ions results in the formation of an ionic bond.

In conclusion, NaNC has a crystalline structure consisting of sodium cations and nitrite anions, forming an octahedral coordination complex. The bond between sodium cation and nitrite anion is an ionic bond, which results from the transfer of electrons from sodium to nitrite and the electrostatic attraction between oppositely charged ions.