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Explain the structure of triple bond of ethynes. |
Answer» Solution :Each CARBON atom of the ethyne is sp hybridised. One sp hybrid orbital each of the two carbon atoms overlap axially to form C - C sigma BOND. The remaining two sp hybrid orbitals overlap with is orbitals of hydrogen to form two C - H sigma bonds. Each carbon atom has two unhybridised p -orbitals. These overlap SIDEWAYS to form two PI bonds. thus, ethne molecule contains THREE sigma bonds and two pi bonds. it is a linear molecule with bond angle `180^(@)`. the `C equiv C` bond, (Bond energy 823 KJ/mole ) is stronger than C = C bond (bond energy 681 kJ/mole). Henel C `equiv` C bond length (120 pm) is shorter than C `equiv` C bond (134 pm).
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