Acetonitrile has the molecular formula CH3-C≡N. The carbon atom in the cyanide group is sp hybridized. The nitrogen atom in the cyanide group is also sp hybridized. The two sp hybridized orbitals of the carbon atom overlap with the two sp hybridized orbitals of the nitrogen atom to form a triple bond. The remaining sp2 hybridized orbital of the carbon atom overlaps with the s orbital of the hydrogen atom to form a C-H bond.