Explain the formation of an acetylene molecule on the basis of hybridization.

C2H2 Molecular Geometry, Shape and Bond Angles(Acetylene)
C2H2 Molecular Geometry, Shape and Bond Angles(Acetylene)

Formation of acetylene (ethyne) molecule on the basis of sp hybridization :

i. Acetylene molecule (C2H2) has two carbon atoms and two hydrogen atoms.

ii. The ground state electronic configuration of C (Z = 6) is 1s2 2s2 \(2p_x^1\) \(2p_y^1\) \(2p_z^0\).

Electronic configuration of carbon :

iii. Each carbon atom undergoes sp hybridization. One s and one p orbitals mix and recast to give two sp hybrid orbitals arranged at 180° to each other.

iv. Out of the two sp hybrid orbitals of carbon atom, one overlaps axially with s orbital of hydrogen while the other sp hybrid orbital overlaps with sp hybrid orbital of other carbon atom to form the sp-sp σ bond. The C H σ bond is formed by sp-s overlap.

v. The remaining two unhybridized p orbitals overlap laterally to form two p-p π bonds. So, there are three bonds between the two carbon atoms: one C-C σ bond (sp-sp) overlap, two C-C π bonds (p-p) overlap. There are two sp-s σ bonds in acetylene (one between each C and H).

vi. Each H-C-C bond angle in ethyne molecule is 180°. All the four atoms in ethyne molecule are in a straight line. The geometry of acetylene molecule is linear.

Diagram :

You are watching: Explain the formation of an acetylene molecule on the basis of hybridization.. Info created by THVinhTuy selection and synthesis along with other related topics.

Rate this post

Related Posts