Question

Borazine is called 'inorganic benzene' min view of its ring structure with alternate BH and NH groups. Which of the following statements is correct about borazine ?

• A. Each B and N atom is $s{p}^2$ hybridised
• B. Borazine satisfies the ($(4n+2)\pi$) Huckel's rule
• C. Like organic benzene, borazine does not give addition product with HCl
• D. Borazine contains dative $p\pi -p\pi$ bond

Answer 1

Answer: (A), (B), (D)

Borazine contains dative $p\pi -p\pi$ bond
Each B and N atom is $s{p}^2$ hybridised
Borazine satisfies the ($(4n+2)\pi$) Huckel's rule

Borazine is isostructural with benzene. The six B-N bonds have length of 1.436. The carbon-carbon bond in benzene is shorter length at 1.397. The boron-nitrogen bond length is between that of the boron-nitrogen single bond with 0.151 nm and the boron-nitrogen double bond which is 0.131 nm. This suggests partial delocalisation of nitrogen lone-pair electrons.
Borazine satisfies the (4n+2} Huckel's rule and each B and N atom is $s{p}^2$ hybridised.