What is bond length of $\mathrm{C}-\mathrm{C}$ bond in alkane having all carbon atoms $\mathrm{sp}^{3}$…

What is bond length of $\mathrm{C}-\mathrm{C}$ bond in alkane having all carbon atoms $\mathrm{sp}^{3}$ hybrid?
  1. $154 \mathrm{pm}$
  2. $133 \mathrm{pm}$
  3. $112 \mathrm{pm}$
  4. $120 \mathrm{pm}$

Solution

The carbon-carbon bond, with a bond length of $1.54 ~Ã…$, is formed by overlap of one $sp3$ orbital from each of the carbons, while the six carbon-hydrogen bonds are formed from overlaps between the remaining $sp3$ orbitals on the two carbons and the $1s$ orbitals of hydrogen atoms. All of these are sigma bonds.

Asked in: MHT CET 2020 (20 Oct Shift 1)

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