Question

1.) Using valence bond theory, describe the bonding in acetylene. Your description must include the type of each of the five bonds and the orbital each atom is using to form each of the bonds.

Answer 1

Acetylene (Cz Hz) In the formation of acetylene both the carbon atoms undergo op hybriditation First of all one electron from the 25 Orbital of a carbon atom in excited to the D2 orbital and then as and one of the 2p Orbital undergo hybridisation to form two 2p hybridised orbital these sp hybridised orbital are lingor and an orunted at an angle of 180' Then, two unhybridised 2py and pz fie perpendicular to each other and also perperdicula y to'p hybrid orbital ground itale- '1822822p? zpe2py' 257' Cencited state : 1 1 c in CH₂ - 1 111 e hybridised Now one of two sp hybrid orb tals of a calon overlap axially with a similar Orbital of second atom to form a-cobond.

The remaining to 8 hybred orbital one of On ach che hoc ac m ulla with 8 orlitals of noo it alom to form hoo. c H o bond since all these aloms lie along a line the acetylene molecule is Linear The hue unhuridica apy and 2p3 ortal of one l atom ollllcap with similar oroitals of t alom to form two T lond this an acetopline molecule contain s o bond & T Cond.
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