Question

Which of the following compounds is known as inorganic benzene?

• A. B₆H₆
• B. C₅H₅B
• C. C₃N₃H₃
• D. B₃N₃H₆
• E. BF₃

Answer 1

The Correct Option is D

Inorganic benzene identification:

• B₃N₃H₆ (Borazine):
  • Cyclic structure alternating B and N atoms
  • Isoelectronic/isostructural with benzene
  • Called "inorganic benzene"
• Other options are either incorrect or not analogous to benzene

Thus, the correct option is (D): B₃N₃H₆.

Answer 2

1. Understanding the question:

The compound referred to as "inorganic benzene" is a cyclic molecule that resembles benzene (\(C_6H_6\)) in structure but is composed of inorganic elements. It has alternating single and double bonds in a six-membered ring, similar to the aromatic structure of benzene.

2. Analyze each option:

• (A) \(B_6H_6\):
  • This compound does not have a structure resembling benzene. It is not planar and lacks alternating single and double bonds. It is not known as inorganic benzene.
• (B) \(C_5H_5B\):
  • This compound contains carbon and boron, but it does not form a six-membered ring. It is unrelated to inorganic benzene.
• (C) \(C_3N_3H_3\):
  • This compound contains carbon and nitrogen, but it forms a three-membered ring rather than a six-membered ring. It is not inorganic benzene.
• (D) \(B_3N_3H_6\):
  • This compound, also called borazine, has a six-membered ring with alternating boron and nitrogen atoms. It exhibits resonance and structural similarity to benzene, earning it the nickname "inorganic benzene." This is the correct answer.
• (E) \(BF_3\):
  • This is a trigonal planar molecule and does not form a cyclic structure. It is unrelated to inorganic benzene.

3. Final answer:

The compound known as inorganic benzene is \(B_3N_3H_6\), which corresponds to Option (D).