Question

C-C bond length in graphite is shorter than C-C bond of diamond.Why?

Answer 1

Answer:

Graphite is sp2 hybridised and C-C bond involves sp2-sp2 hybrid carbons. Diamond is sp3 hybridised and C-C bond involves sp3-sp3 hybrid carbons. Moreover, greater the s-character in hybridised atom, the smaller is the size of hybridised orbital and greater is the overlapping (hence shorter is the bond length).

Explanation:

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Answer 2

Answer:

Fourth electron forms a π Bond. The electron is delocalised over the whole sheet. Due to this C - C bond length is shorter in graphite. In diamond each carbon is in sp3 hybridisation.